I have the Elite 4, pro's-its really warm, it has a tough fabric at the bottom of the bag so you can use it with boots on, it has the expanda panel to make it a little larger, pretty good build quality, and a fair pricetag.
Cons-its quite bulky and heavy compared to a down bag, it can be quite 'snug', I wouldnt fancy it if you're of a larger build, the zip on mine plays up a fair bit even though its new.
All in all I think its a good bag, but i'd def recommend trying one first if you're a big guy!!