I'm starting to use it every other week but letting my shoulders dictate what I do. I agree with those guys to a point, no sense in buying a custom $250+ shirt, never touch with it during training and then expect to set a PR with it miraculously in a meet...
The thing is also for the most part, those guys feel in order to bench better just bench and do bench like movements. I feel unless your an elite bencher this is not the case, too many ways to improve physically and mentally by using a large variety of movements and focussing on the muscle groups that really help you.
IMO a huge thing with this style though is the way these guys set up, it will work for 90% of everyone out there trying to bench and help a bunch. It's the hardest thing, once you practice, you will soon learn when you feel right and when you don't and what you have to focus on with your flexibility, that's right... I said
flexibility.... almost as big of a curse word as
diet in the powerlifting world...
Unless you have access to some guys who really know what they are doing, buy a DVD from Sebastian off of ebay for less than $10 bucks, it's well worth it.
The volume is extreme, the weight is extreme... is this a Xyience commercial? ...all relevant to a person's own abilities that's why I don't see how someone could handle the beating week after week, just my opinion...
They are pretty up front about the fact that your raw bench will decline once you become a dedicated shirt bencher, why risk the injury if it's not needed and with a shirt on, it's like a mental crutch, giving you more confidence to take more chances.
I also don't agree with taking a bar almost down to your belt in order to touch, you just have to face it sometimes that a there is such a thing as too much shirt... but there are many things that can work with this style of training...
Dev and Wnt2beast have a lot of experience with this style, hopefully they will chime in as well...