Pros: I use mine when I go shopping or for a walk and they work just fine. There is some minor slippage but nothing like the tiny ear-buds. Those little buggers shoot out like my ears are spitting watermelon seeds. In the winter I just slip on a headband or toq
Cons: Can't think of any except they could be a little louder.
Summary: I don't know why these are still for sale when so many of us have reported that they inexplicably die. Mine lasted 3 runs, but I mostly like them so was willing to purchase Sony 2 GB Digital Music Player (Black) to give them a second try. I'm also trying these BOSS Electronics 2183 Sports Wireless MP3 Headset because I'm desperate to run and bike without earbud wires. When I say I mostly liked them, they didn't really play nice with my Mac.
Summary: Okay I bought this a couple months ago and it advertised I'd get free 50 song download from Sony with some sort of certificate or code. The player arrived and nothing in the shipment about the 50 songs. I contacted Amazon and I received notice from Amazon they were so sorry my player didn't work and they'd send a replacement. I immediately sent another email to them asking about the songs and please don't send another player.