My Dad has used this bag a lot, and this would be my opinion based on what I have seen:

- It is pretty durable and has lasted a couple dozen rounds without much wear

- He doesn't like putting more than 7 or 8 discs in it or it is a pain to get them out and put them back in.

- It is not very sturdy (especially when not full), but that is probably pretty common for small bags 

This is a pretty solid little bag, pretty typical to any of the other small shoulder bags. The material is really durable feeling, giving me confidence that it'll last a long time. I'm pretty excited about that. There are multiple snaps that can expand/contract the bag. This reminds me of the nutsacks.

The description of the bag is pretty accurate, it can hold up to 12 discs. There are some snaps to keep it "smaller". They hold well, which is nice. . . but also a little annoying. While playing, I don't snap the bag closed.

Attaching this bag to my belt makes me feel a little comical, as it is a lot to hang on my belt. I think if you're hanging it on your belt, don't carry the bag fully loaded. It is more workable, and not so heavy. With only three discs in, the bag wasn't in the way too much of my throws.

Overall, this a good little bag. I enjoyed playing with it. Wearing it on your person or on the shoulder isn't uncomfortable in anyway. And it holds a good amount of discs to cover most shots.