I'd buy them on blind faith to be honest. They are quirky like most british speakers. They have a break-in period to warm up, and are very sensitive to placement. Once you find that sweet spot, they are pretty darn incredible, especially given their low profile and how easily they are driven.
Interesting thing to note. I take the exact same lossless MP3 and play it through a Windows Phone vs an iPhone 4, and the audio is vastly superior out of the Windows Phone. So much so that I bought a Zune for my music now exclusively. Not sure if it's the iTunes process, or the codec Apple is using... but listening to these out of an Apple device (or at least an iPhone4) will not give the best results.