It sounds like the ones that you heard were either faulty or possibly even not genuine? I find the sound very well balanced, and certainly not thick in any sense. But what convinced me above all else was the amazing sound-stage. With the supplied cable it is pretty good. With the balanced cable from the balanced output on the Onkyo the sound-stage is stunning. They don't go especially high in frequency according to the specs, but I am 60, so my ears have rolled off a bit over the years. Isolation is pretty good with the standard silicone tips supplied, but I have put a set of Comply tips on and it's even better. I had not had much experience with IEMs before getting these, so I auditioned a few when I was looking (can't remember them all), and I was a little worried about mechanical sound from the cable, but it's really a non-issue for me. They are also, for my ears at least, very comfortable. They come with a nice firm case which protects them well and has space for both cables so that I can use them on other devices if I need. Oh, and I like the colour too.