My husband and i ordered these to use with our iPhones. He has an 8GB 3G and I have the 16GB 3GS. These headphones were super easy to set up just following the simple instructions in the manuel that came with them. They have worked pretty flawlessly for me although my husband takes them running and really "put them to the test" and they do skip occasionally with all the bouncing movement from running. For light workouts though they would be great. I use them while doing housework and have never had a problem, would also be great for travel. You can also use them as a bluetooth headset and your music with pause and you can answer your phone using the headphones, which I thought was a great feature. The pause/play, and volume controls on the sides on the headphones are really convenient as well. I would have given them a 5 stars if had not been for the minor skipping when my husband works out. I would really recommend these for iPhone users looking for a nice set of bluetooth headphones though. BTW the ones pictures our red/black. We received blue/black ones.