I've been liking these quite well, the one objectionable factor being that the silicone tips are somewhat prone to come off.
I found that the silicone tips (provided in excessive quantity!!!) with a pair of BrainWavz M2's hold more tightly to the AX-35's than the stock tips.
I have yet to try foam tips; I have some coming in from a Kickstarter project that I'm quite hopeful about.
cbbrowneI agree with you on the silicone tips. I had one get lodged deep into my right ear canal. Thankfully we had a set of surgical tweezers at work to remove it or I would have had to sit in the emergency room for such a trivial matter.