I just picked up some shure se535, and was able to test them out today at the soldier field 10 mile run. I am very impressed, as I used to own the e5, e500, and e530, with the development. The ergonomics are perfect, and are more comfortable than my jh13's after 3 refits were. The shape of the shell seems to have been tweaked to really sit flush inside against your ears, there are some subtle curves that seen to make all the difference from the previous models. Isolation was good using the clear silicone things that were more about convenience putting in. The earpieces swivel freely from the cable insert which is brilliant. The cable and shell build quality is substantial. The sound I found very smooth and linear, no crazy bass humps and the highs nicely detailed yet controlled, I would say more of a pro/monitor sound. Extremely happy, even more amazed at the comfort achieved by a universal and I haven't even played with any of the tips yet.