I put a set on about a month ago. I have some upper back problems and need the bars closer.
They are well built, and fairly easy to put on, however the instructions are lacking. I found them not very clear as to which parts arrangement did what. Also, parts will fit either side, but result in much different positions.
I finally (on the 4th try) found a position that suited me. Be aware, the black top fork cover can not be used with these on, but not really an issue.
I just read the instructions on Kury's site. These are different than the REGs and have some similarities to the MBLs. The most significant difference from the REGs is that they significantly change the angle of the handlebars, moving the grips in toward the center of the bike. Many have found this uncomfortable but some like it well enough.