They don't hurt my ears for extended listening anymore with the medium silicone tips that come on them, my ears have adjusted to them nicely, wearing them the normal way BUT... The cable hurts my ears after extended periods. Not really a big problem, the IE8 cable bothers my ears after long periods and I think thats a god tier cable in terms of what comes stock on universal IEMs. Extremely flexible and what not, reinforced kevlar, smooth, my ears still don't like over the ear but I've been forcing myself to wear them over the ear. The IE8s soundstage is more open and airy like that and the TF10s just sound like a different IEM. I'm still going to upgrade the cable though, it's bunches up too much, it's not very free flowing. The memory wire for the ears is a good concept, I actually do like this about them, but, the material overall is not. I'm glad my ears take these beauties well, I don't find them heavy at all. I was actually able to work out with them at school in the weight room doing various exercises and I have, just for fun I've swung my head around widely and they wouldn't break seal. I'm quiet pleased with this although I won't rule out customs for the extra comfort factor and the improved mids based on what people are saying.