I haven't erected mine permanently yet.
I want an asphalt floor (not concrete) and haven't had time to have it paved. I chose asphalt over concrete because a local nurseryman used it under all of his greenhouses and I asked him why. He told me that it's a lot easier to anchor the edges to asphalt and that asphalt sheds water better than concrete and is much less slippery when wet.
I did assemble the back and front panels when I laid it out to measure for the base and it looks about 10 feet high at the peaks. I hope to have it up before the end of September - before it gets too cold to lay asphalt. I'll definitely post some pix here.
I too, read about the reinforcement issues for windy areas but after pricing out polycarbonate panels and extruded aluminum framing individually, the cost figures out a lot higher than the price of the greenhouse.