From the start I shall state that I am no music technician, so this review is very much one for the 'average' person. There's a place for detailed examinations of bass and treble and whatnot, and with these currently retailing at approximately £8.30 online, this isn't it.

These earphones have been around a few years now and that is reflected in the really rather low price.
Ever since I can remember I've had problems getting earphones to fit properly. Some would fall out with very little provocation, meaning I had to screw then into my ear canal in order to get them to stay put. This was uncomfortable. Even if I did find some that vaguely fitted, comfort would again be a problem the longer they were used at a time.
These however are fantastic from a comfort point of view. I had been using previous earphones while at the gym and they eventually rubbed and became uncomfortable so I wondered if these earbuds would help the problem. They really did!
The earphones come with three different sizes of rubber caps to best fit your lug-hole. Predictably I fitted mine with the biggest (which is probably suggestive of why others wouldn't fit) and they fit wonderfully. At the gym they fit snugly enough so they don't get pulled out easily. What's more is that after an hour or so of sweaty, red faced gym buffoonery they still haven't rubbed or become painful.

The sound is everything you'd want from an earphone, certainly one in this (under a tenner) price bracket. I listen to a wide and eclectic variety of music through mine and I'm more than happy with its range. Both bass and treble are more than adequately represented - besides if you're that into how good your music sounds, you buy far more expensive, larger headphones and you don't do it while you wonder whether Trevor from accounts should wear longer shorts if you've agreed to be gym buddies.

The product comes in that sort of hard plastic packaging that is virtually impossible to open, fortunately I had my plasma cutter to hand so I was in! For your £8.30 (current price) you get the earphones themselves with the medium sized caps already fitted. The cable is asymmetric, meaning one earphone cord is longer than the other. The point of this is that you loop the one going to your right ear'ole, around the back of your neck - this means you don't have the dangly cord in front you, or at least not dangling under your chin. I do like this but (again) at the gym I've found that the cable can get a little stuck to a sweaty neck (sorry bit much), this results in the right phone being pulled on. But maybe that's just me.
The jack itself is your standard size and will plug into whatever has the 3.5mm size aperture, it also is apparently 24k gold plated, I'm not sure whether that makes much difference to anything but just thought I'd say. A nice touch is that the package includes an extension cable (1.2m), not sure why I'd use it, but I like that it's there.
As mentioned before, there's the choice of rubber caps to fit all sizes ear holes. Then there's a solid plastic case to keep them all nice and clean while you're not using them, plus it helps keep the wires from tangling. Finally there's a little grey pouch to keep it all in. To be honest I've found myself not bothering with the plastic case.

Now the caveats. I have only been on the receiving end of these phones, so I'm not sure how they rate on sound leakage, nobody has complained yet however so I can draw something from that. I have also heard some accounts of the tiny speakers being a little delicate and giving up after a bit. I, however have yet to have any problems. I will of course update as necessary, as I have only been using these a relatively small amount.

I've kept mentioning the price for a good reason. For what they are, I believe these phones to be a good deal. That said I have looked around and the prices do seem to vary rather wildly.