The quality of this bag is quite amazing, considering the price. I mean, it looks great in the pictures and it's gotten some awesome reviews, and it still surprised me!
Since I just recieved it I can't speak for the durability, but the materials, the stitching, the zippers, it's all really solid. It has some nice features with the concealable shoulder-straps and the pad and strap inside to lock the neck of the guitar.
I have a jumbo guitar (Ibanez EW35) and it fits easily. I've had some trouble fitting this guitar in other bags because of it's big booty. Not here. So for you jumbo guitar owners out there - this bag will do the job.