This is my third pair of these PX 210 BT (I tend to leave them on planes). I have also had the model with the noise cancelling function and would strongly recommend the "plain" bluetooth only version for the following reasons:
- noise cancelling is not particularly good (compared to bose, etc) - battery life is reduced - can cope with steady hums very well but not good with intermitant noises (such as tubes)
Other very minor points: - blue light shines very bright (however it is obviously very useful to know that they are on!) - with two bluetooth products (an iphone and ipad) it is very irritating to pair and unpair them the whole time - the cover of the micro-USB port falls off after a month or two of use - low battery warning goes on just a minute or two before completely cutting out. There should be an "hour left" beep or something similar
They are very comfortable, the range is great and I have used them whilst running perfectly. I have used them in the rain plently of times and nothing has ever gone wrong. Battery life is very impressive.