These are quite good actually (as if they weren't going to be!)
So I ordered these to upgrade my aged and battered 3/4 hiking bibs for when the weather got to cold for a single layer. Wasn't sure how the stretchy neck opening would cope with my super un-athletic body squeezing through it but all the rolls got through and it was all good, the longjohn that is, not the rolls, they were still there. It's a LongJohn not a corsette. Corsette reviews are on a different website.
Anyway, moving right along - having done a double layer like this previously using a normal wettie, which the aforementioned rolls no longer fit in, I wasn't 100% on how comfortable having the EXOfleece under a pair of hikers would be in practice, but it was absolutely fine.
I also like the fact that when my 3/4's finally die I can simply throw some hiking pads in to the ExoFleece and continue to use them as normal hikers.
The only down side is the EXOFleece is not like a bionic Exoskeleton - they didn't make me a better sailor, but I'm sure Rooster are working on incorporating that in to a future model - in which case you'll have more of my money!
Excellent product and highly recommended.
In summary - stop reading reviews on these things and just get some ordered, you won't regret it.