I just built a greenhouse with a sturdi-built kit and would highly recommend them.
They will customize to your specs if needed.
They are built from cedar as well and offer a great energy saving option which consists of an inner lexan layer to give you an insulating air space between the lexan and GLASS walls.
Yes, nothing like having a clear glass wall on your greenhouse.
I did go with the plastic dual wall roof and an additional inside layer to create two insulating air pockets.
