Without ear-surrounding pads, there's a fair bit of sound leakage at higher volumes, which I found they 'phones will happily reach without distortion. They bleep at you when you've reached the upper limit, which wasn't as loud as I'd have expected - a sign of a volume-level limitation in the European models? As for the leakage, whether that's an issue or not depends on who you're sitting next to when you use the 'phones.
With my music player tucked into a bag, the wireless set-up operated perfectly. Wandering around my house while the player stayed sitting on the kitchen table, however, I found the system more prone to audio break-up - more so, it seemed, than I experienced with the WMS. Metal was the chief culprit - duck down to load the washing machine and the Rolling Stones' A Bigger Bang immediately became a bigger stutter as the data packets start failing to get through.
Logitech claims a battery life of eight hours, and that's what I got out of them.
Logitech's wireless headphones work a treat to deliver great sound quality over a distance. At £100, it's a very pricey product, particularly if you plan to use it with a player other than a remote control connector equipped iPod. After all, in-the-ear earphones are light, convenient and largely hassle-free.
However, the Logitech product does have uses beyond the iconic music player - or other MP3 devices - for that matter, and when you include the ability to pump out near-perfect sound from a wide range of sources, it becomes much better value for money - especially since you can find the set online for almost two-thirds the standard asking price. ®