There are very few situations a chainline cannot be remedied without resorting to "adjustable chainline" bb's. 3 piece bottom brackets went to two piece for a reason. They are more tolerant of bb shell errors and above all, they can be secured with torque. Adjustable bb's are secured with lines of loctite. Phil wood/Miche. If you don't have problems with these bb's then great, but if you do you're in for a world of headache. think what happens when you start getting a creak in the bb area. Now is is the left cup? Right cup? Is it backing out? Is it where the cups meet the bb? Left or right side? Have fun removing loctited bottom brackets.

Bottom line is, don't buy it unless you *really*, *really* need to.