It has to be noted that these speakers are incredibly quiet, as someone else mentioned. The bass is decent for the price you pay, but at times it over powers the actual dialogue if watching a movie.
If using with your computer I would suggest using SRS Labs, an audio enhancer. This amplified the quiet sound and made the actual music more clear.
A complaint is that the jack is now faulty. I have only had the speakers for a few months and already its a real effort to get the jack in the right position in the headphone port of my laptop and mp3 player, or else sound doesn't come out of both speakers. I haven't seen any other reviews complaining about this, so maybe it was an exclusive fault, but has to be mentioned.
However when they do work, they are enjoyable to listen to, particularly for music. An added advantage is that the 2 satellite speakers can be disconnected and plugged directly into your mp3 for personal listening. Also the bass can be adjusted directly from a dial on the sub.