Tierra Garden 50-2510 Haxnicks Garden Sunbubble Greenhouse, Large

We purchased two "bubble" tents - this Sunbubble 12' and the Alvantor 15'. This one is far superior for an outdoor winter room, but was too small for our needs.The quality of the Sunbubble plastic is better - thicker and stays more pliable in low temperatures. In windy conditions, Sunbubble holds 100%. Wind tore two panels of the Alvantor to shreds. Literally, we had shredded plastic flapping around like fringe.The design of the Sunbubble is much better - the supports for the roof are metal and locked into place with a metal plate so it can withstand the weight of snow. The roof is sloped so less snow can accumulate on top. The slope of the roof also seems to allow sunlight to heat up the bubble better. Contrast the plastic supports, absence of a center support, and minimal slope of the Alvantor. In a 2-3" snow, the Sunbubble was unaffected. The Alvantor collapsed in on itself, with the center of roof touching the ground such that the contraption resembled a giant daddy long-legs spider.The Sunbubble has a vent for each panel (thus you can choose how many to open and get good air circulation), sturdy supports to hold the vents open, and a design that keeps rain out even when the vents are open. This allows for good air circulation and convenience. The Alvantor has only two vents, and they are just zippered sections that allow rain/snow to enter when they are open.The Sunbubble is flat to the ground at the single door. The Alvantor has two doors, but each has a piece about six inches high that you have to step over as you enter and exit. It doesn't look bad, but people tend to trip on it.If you are looking at small tents, Alvantor offers easier set-up than Sunbubble. But for large tents, Sunbubble wins. The Sunbubble has side supports that are not clearly marked, so it is easy to get confused and install them upside down. And the sturdiness of the clips is lacking. But even though we broke 2 clips while setting up, the broken clips did not affect the sturdiness of the construction once everything was in place. And getting everything in place did not require a large amount of strength or coordination.In contrast, the Alvantor pops up like a child's play tent - the initial part of assembly is almost comically easy, as it goes from being a small disc to a large structure in seconds. But the part they don't show you in the assembly videos - installing the plastic roof supports - is EXTREMELY difficult. It'd take a lot for me to explain it here, but suffice it to say I'd recommend a 10' ladder, temperatures above 45 F (so the plastic isn't too fragile), and pretty good arm muscles and balance. Alvantor's smaller tents don't use roof supports, so a small tent is indeed very easy set-up. But if you are using a size that requires roof support, it's a tough job.This Sunbubble is meant to be put up and stay up for some time, whereas the Alvantor is meant to go up and down within a few hours. But if you are looking for a winter room during COVID (ie, a place where you can have a friend over and remain socially distanced, in the outdoors, with air circulation, and not freeze in winter), you need something that can stay up. The Alvantor plastic is thin and brittle in the cold, so you need warm temperatures to set it up. But if temperatures are warm enough to set up the Alvantor, it's too warm to hang out in the tent. And moving furniture in and out for each use is inconvenient to say the least.All that said, the 12' Sunbubble did not fit around the fire pit/patio furniture we already own. So I ended up reselling it to a neighbor. We have the 15' Alvantor around our curved sectional with a 4' built-in fire pit in the center. I have purchased heavier-duty plastic and that I'm using to cover/replace the Alvantor plastic. It is not too difficult, but I don't know if it will hold since I'm just using clear tape. When there is a chance of snow and we're not in the tent with the fire running, I have an old patio umbrella that I cut down. I place it on top of the fire pit and open it up so that the wooden umbrella frame/pole support the roof of the tent from the inside.Finally, there's price. Sunbubble costs about 1/3 less than Alvantor for the same size tent. Love, love, love the Sunbubble!

I should have disregarded the positive reviews on this thing. First of all I am very familiar with quality tents for packing which are also pre assembled with (shock corded tent poles) They have springs or shock cords making popping them together quite quick and simple. I was just assuming this was the same type of pole assembly. NOT AT ALL!!! You will need to grip the poles firmly and bend them to get them together. There is no spring in the poles. If you do not have strong hands this won't be easy. Then there is the fact that the thing is laying on the ground and you are suppose to pop all these cheap poles together making sure you don't get the top pole mismatched with the bottom one. This becomes increasingly difficult after a few poles are assembled as you can't open the thing up very far because the door isn't tall enough to allow you to see up inside the thing. Mine is currently laying on the ground only a few poles assembled and I gave up. I tried to stand this piece of crap up so I could spread it out at the base in order to see what the hell I was doing and that was a joke, without someone else helping. And as for quick take down and storing, I don't know if I will get that far ever. It may end up at the dumps. I should have known I would not be getting any quality for $300. Should have just purchased a regular small greenhouse for a little more and dealt with putting that up and taking it down. I got this for the supposed ease of putting it up and taking it down, planning on using it for fall/winter salad greens and storing it for the summer. If you are looking for a at least a fair quality inexpensive greenhouse, just go with the conventional type with a rectangular shape. I am a do it yourself type of person, and have put many things together including several greenhouses, and many other things., but this thing is very poorly thought out, and I couldn't recommend it to anyone at all. It would be going back but I doubt I could ever get the stupid thing back in the box. Very very sorry I made this bad purchase.