I've had my Mentors now for 2 years and still ABSOLUTELY ADORE THEM and have no compulsion whatsoever to try and top them. The level of detail, timbre, resolution, staging, imaging, fat yet controlled bass, sparkle, refinement and every other term , I could go on and on... I Love these these IEMs. The only thing I dont like about them is the relatively shallow / flat socket placement. The sockets have gotten loose and the cables now pul loose when putting them on or taking them off. On the upside, UM is doing the maintenance for me complimentary, I just need to take care of round trip shipping and they'll be out of my possession for approximately 3 months. But that's Okay and speaks volumes of UMs after sales service.
It's really a sensational set of IEMS.