They are great for running, jogging and walking fast.
In Europe most people do not wear in-ear phones while walking (commuting), they wear On-Ear or Around Ear phones (sennheisers are very popular)
Bose IE2 does the job very well, not the sound part. Looking at purely on sound perspective I consider them maybe $50 phones (about 25% worse than Brainwavz M2s, but 30% better than Maximos). So you are left with remaining $50, and what do you pay for that?
1 - Name
2 - Comfort
These phones are extremely comfortable. When walking fast, jogging, I could not find a single phone that will stay in my ear and give the same sound quality. I always will have to tuck the phones back into my ear every couple of minutes for all the phones I tried except the Sennheiser 300 CX2's. But they don't sound anywhere as good as the Bose IE2's.
So it all depends on what you are doing, for jogging, running, walking these are doing an excellent job.
For sit down listening, definitely not worth the price.