Bass has been my problem with them, it's there, it's accurate, it's anemic. You can hear it, but you don't feel it. Playing with positioning helps, but I don't think I will ever hear bass sound like the Shure 1540, Senn Amperior, etc.
Clamping was a problem initially, but the headband can be stretched, and I find, after doing that, don't feel the pain anymore, can wear them for a long time (but again, clamping or no clamping, they are an odd fit)
No more music posts for now...(maybe if you beg