I love my new 8 x 15 shed. I went with the wood frame platform for a base. It took me about 6 hours to level the ground and build the platform to set the shed on. It took another 9 hours for me to assemble the shed by myself. It would go fast and be a little easier I=with a helper, but it is doable by yourself. I do recommend if your going to do this have some experience with assembling things. I would rate the platform building difficulty from 1 to 10 to be a 4 and the shed assembly a 3.

Pros: Plastic so you don't have a any maintenance and painting for the life of the shed. Nice plastic shed floor that instead of a wood floor.
Cons: Assembly would be difficult for someone with no tool experience or can't read directions and have a hard time visualizing how it goes together.