i've used one for a few years now for my back and quads....never did anything with delts sorry. I sold them for quite a while and always had nothing but good feedback on them. We started selling them when a bunch of the Carolina Hurricanes players wanted them.
kewl thanks show i went and bought one for 14 bucks from wally world
it does hit the lats real good and the upper part teres minor/major cant remember which is where i get real tight and actually hurts pretty good...its hard for me to hit the front and rear delts but I heard you can use a medicine ball for that and i think ill try my basketball
It also feels pretty good on my back it even cracked it pretty good, hopefully if i use this consistently for a couple weeks i will notice a difference.
if nothing else it does feel pretty good
this one hurts pretty good though, but thats really where i get tight