I believe the product you saw at HD was this:
I used it to help finish a room in a walkout basement and it worked
great. Yes, it is a bit more expensive, but here are the advantages I
Small, each piece is only 2' x2', trimming around posts, doors,
closets, etc is much easier.
Portable, I was able to fit an entire rooms worth (50?) of pieces
inside my car.
Easy to handle, one person can do it all. Sure one can handle
4'x8' sheets of plywood by yourself, but it's a pain.
I got mine at Menards (upper Midwest HD wanna be). It's on sale right
now for $4.58 with a $50 giftcard if you spend over $500!