It's always difficult buying online when you cant test the item, you have to rely on reviews. When I bought these they were an unknown to me, but I took the plunge and have not been sorry. They 'pair' as soon as the charging box is opened which is a huge difference to what i am used to. I am a Linux user and other ear phones I have tried are difficult and a real pain to pair. I always needed to change Bluetooth settings. But not with these babies, they blew me away at the ease of connecting. I've had them a couple of weeks listening to music and watching movies with out any problems through my system. I've had trouble with other brands going out of sync, these...so far so good! The batteries seem very good, lasting 2 movies without any problems. Also, you can't beat the Warranty, 12 months, plus register on their web site and get an extra 18 months. So, 30 months total is extraordinary. So, what I'm saying is, that I really like them.