I've read the comments here with great interest. I bought the Triport IEs in early November and, like many, my first reactions were not exactly favorable. The big bass, looseness of the fit and the complete lack of isolation had me considering the Bose 30 day return policy. I did let the cans run for 3 straight days on an older MP3 player and then started to experiment with the ear tips and positioning. The small tips, while providing a tighter seal, sounded much too "boomy" to me. The mediums were better and if I twisted them out a bit, they were pretty secure. I then tried the large tips and, like others here, heard a much cleaner sound. Bass was, for the most part, solid and tight and the mids and highs seemed much more open. I use my Ipod when I walk every day (about 50 minutes or so) and found that the large tips always felt like they were moving around. Then, following another suggestion, I wrapped the cables behind my ears and used the slider to tighten the slack. Bingo! Although the cables moved around a bit, the large tips stayed put and the sound was wonderful. The IEs get sound quality from the Ipod that I wouldn't have thought possible. The lack of isolation is still an issue and I would definitely use other headphones on a plane or train. For my primary use, however, walking primarily in non-traffic areas, they are great. It would be difficult to go back to more traditional ear buds at this point.