They're sure great for my reflexes - yesterday I caught one before it could land in the toilet
The thing is that I can't even tell whether the tips are all too big or too small. I used to have Etymotic in-ear buds and with those I could definitely tell when they were in the ear-canal vs. just pushing up against the opening. No idea with the Pros. Maybe my ears have just become insensitive.
I even do the awkward looking trick of pulling up on my ear with my left hand while I insert with the right. That right f*$ker just won't stay in place for more than a few minutes. The incredible thing is that even without a tight fit, they still manage to cancel noise well.
what about the fit tester via the iphone?
sounds like the old apple in-ear headphones all over again... grr.