I don't have them yet. Just got the email that they shipped from Amazon today, so should be Monday (sometimes even get Sunday deliveries, but I'm figuring Monday more likely). I'll post when they come, they certainly have been compared favorably to the best iem's out there. I don't have the Shure 535 to compare, sorry. Do have many too many, including the UE900's, and too many others to list completely (and too many for my financial health). Quick list includes Westone 3, 4 and 40, JVC 850, Sony XBA-3 and H3, Dunu ik, ATH-IM70 and the old AT 1K, FAD Heaven V, Triple fi 10 and UE700, Doppio and Tenore, Earsonic SM64, Ety ER4P, and other assorted junk (haven't updated my profile in a while). Need to have a fire sale one of these days. As for the UE900, so far, haven't grabbed me, a bit flat to my ears, lacking some sort of "oomph", but, as you can see, they probably don't get enough ear time to really give them a fair shake.