Just got a green one in. Seems like it's going to be a great bag for a great price--$50 w/ free shipping.
I don't see any immediate need for a frame, but I'll probably get around to try it out eventually.
The only concern I have is that the "putter pocket" seems a bit shallow, so I'm worried my discs might pop out. Maybe I will figure out something to make it more secure.
Another thing worth mentioning is that I've tried on a Grip and it was too small in the shoulders for me. I was concerned this bag would be the same, but while it's not roomy, it fits reasonably well.