Opinions on buying a Sunglo Greenhouse?

[Becca]

I've been trying to figure out what type of greenhouse would be best to buy for my area (cold temps in the winter usually a couple of weeks in the teens, sometimes in the single digits). I was cruising Costo's website and found what appears to be great deal on a Sunglo Greenhouse. It appears to come with a bunch of extra items that I would assume it wouldn't normally come with, usually Costco get's the good package deals. So I thought I would ask if anyone has any opinions or inputs on this greenhouse. It's not as pretty as the victorian glass style, but looks very functional and well insulated: Costco - SunGlo 8' x 12.5' Expert Greenhouse

Any advantage over a tempered glass greenhouse compared to the polycarbonate?

And what about size? I originally wanted something larger then the one in the link (like a 10 x 12 or 12 x 20) so I could grow other plants along with my orchids, like over winter my geraniums, maybe try a tomato plant year round, and start my vegetable and flower seeds.

So what do you all think? I was going to wait until next year sine we just moved...but is this just to good to pass up if I can afford it?