Hey Alex,
just took a look at it again after I bought it several months ago.
I like that basically all of the needed tables are there and the sturdy quality. It is, of course, foldable and tends to bend back towards you in the middle (imagine an open v shape).
If you are really into GM a lot of AToW games than by all means it should come in handy. If not, printing the tables out and having them next to your notes might also be okay.
I just bought it because I am a geek and wnat to purchase close to everything for Battletech.
Hope this helps