I, who have the E4's/E5'/and the E500's really enjoy the output of the Shure house sound. The only thing that I didn't like about the aforementioned headphones was the cable and the lack of memory wire. The PTT was a feature that I felt was totally unnecessary, I could just as easily use the pause button.
People could just dump the PTH and use another 3' of extension from another brand of male on one side and female on the other and that is that (which is what I did). The 535's don't have this problem so I just used it as is.
I was really fortunate enough to have won the 535's in the Canjam raffle, and in less than 3 weeks they were 'aknockin' on my doorstep..
I lent them to my wife this summer (sorry if I'm repeating myself), and somewhere between her and I (as long as I'm on this forum I blame her, of course) they became the missing sock in the drier. We tore the apartment apart for 2 months and found french fries that have been missing for years, along with 49¢. But since I enjoy them so much (and I own a pair of UE-10's and JH-13's) and since I won them in a raffle for free, I called Shure and ordered a brand new pair for myself (there's no way in h-e-double-toothpicks that I'm ever allowing anyone else to borrow these....not even for a second). With a pair of Etymotic baby blue tri-flanges (big head, small ear canals), they are perfect for business travel (planes, trains, and automobiles...sans the latter). Also great for the hotel when my carry-on space is at a premium when you include a checked in tool bag, and a carry-on computer bag (with every cable, floppy and zip disk know to man). I find them vastly superior to my MTPC's.
Moral of this long-winded story? Had them (for free), lost them (wife's fault), and paid msrp for a replacement pair.
I like them a lot.