to get things in context i am not one of these people who have just taken a shot at getting some decent headphones after thinking there may be something more to the stock ipod headphones, perviosly i have had three pairs of etimotic ER6i's, a pair of shure E2c's, ultimate ears metro.fi 100, and now these westone um1's, i use my monitors at work under ear defenders this provides extra sound isolation and also allows me to listen to music in comfort without pain from the ear defenders pushing against the headphones all except the ultimate ears have done this well.
I have used these headphones with the etimotic platic tips however the foam tips provided are very comfortable however they will not last forever and tend to pick up muck from your ears.
I was rather hesitant when buying these because of the rather large price, I found reviews saying they were the most comfortable headphones they had found within the range, and I definitely agree with them using them all day with no problems. Some users who have not had these type of monitors may find them a little odd you do stick them in your ear canal and this is how they isolate all that sound but I found after a few minutes you forget they are that far in, and now I forget I actually have anything in my ears the sound feels like it's coming from inside your head! After that you will never go back to `normal' headphones!!, another thing to get used to is the wire over the ear these are defiantly better designed for that than the shure e2c's but with glasses I find that you can notice it on occasion. But it's nothing to get worried about. Build quality seems to be fantastic, with a relatively sturdy, L-shaped jack and a good connection between the wire and the headphones when previous headphones have broken I wished I could design the faults out of them with these headphones however I'm stumped to find any faults and have to conclude that with their two year warranty and the fact that they fit all my ear tips for my Etimotic ER6's I will not have a better pair of headphones unless I upgrade to custom monitors at £500 a pop.
Definitely worth every penny of that rather scary looking price!!!
A note on the seller, I was concerned when I got these that they were not sold by Amazon. But they arrived very well and the seller seems to be a very good genuine retailer. Judging from their website, which is worth a look.