First off, the headphones are easy to pair up with your device, and the free smartphone app is a simple way to adjust the settings and features. Likewise, you can download the PC / Mac software for free, plug them into your computer and administer them that way if you like. They also charge from the USB connection, and a full charge seems to last a good while (certainly a few hours of constant listening).
On the default, factory settings, the sound is extremely bassy and a bit 'fudgy' for my liking, and it took quite a bit of fiddling with the settings to get it right. That said, I completely love the SBX Crystalizer feature - it makes a huge difference to my ears, filling out the frequencies and making tracks sound full, bright and as complex as they were meant to be before compression. The great sound processing is what you'd expect from what is, more or less, a high-end computer sound card in a pair of headphones.
Podcasts and talking books also come to life thanks to these features, which although meant to enhance music tracks, work a treat on voices too. Narrators and presenters fill your head when you have these on, and as they do a great job of silencing outside noise too, they're perfect for switching off and zoning out to your favourite programmes.
Likewise, the phones are super for making hands-free calls or Skyping - the built-in microphone picks up the voice very clearly, and I had no problems wandering around, yards from my phone, with crystal call quality.
The multi-function button for remote operation simplifies some operations, and the controls are generally well-placed to reach quickly and perform basic functions. However, the default settings seemed a bit odd to me - a double press does not, as I expected from other headphones, skip to the next track, but starts a phone call to my last-phoned contact on iPhone. Odd!
Also, despite some hefty padding on the ear pieces, I have found them a little uncomfortable to wear for long periods. Maybe I have a big head! But it's something to watch out for if you don't like a snug fit. They tend to press quite hard on the ears, squashing them to your head. The adjustment strap allows some give up and down, but not outwards, which is where I think the problem is. Probably related to this is the fact that they're not sound-tight, either - friends and family could hear my music playing on louder volumes (and believe me, they go LOUD - probably far too loud to be honest, as you'd be risking ear damage at the top settings).
All in all, I feel I should really like these more than I do - they have all the ingredients of a superb piece of kit for a music-lover, but it's not quite perfect. Still, if you can get the mix just right, they offer a superb listening experience (and they look darn cool too).