I've never used one, but here is my take on the photo:
Seat looks thick. (thats good)
I'm not sure about the two big pockets on the front. I prefer them more "compartmentalized" (is that a word?).
The mesh on the front is good if your in a warm environment.
Are there any internal pockets or are ther only those that I can see on the outside? (If you dont' carry much it won't matter)
Does it have any padding in the back. If (and thats a big if) I sit for too long against a tree, I'm usually wishing I had a newer vest with heavy duty padding on the back.
I would look around for price. I thought I could remember seeing them for 49.99 somewhere, but maybe that was on clearance last year.