I agree that with this or any other musical product that being able to test them out to see if you like them is the way to go.
I have a Logitech z5500 and don't like the sound of the satellites at all. The sub is quite good and I use them with JBL Eon G2's on occasion. I agree with ScottY that there are no mid range at all. And to me they sound exactly what they are, 2 - 3 inch speakers with no real cabinet to help give any depth.
I think it just depends on what kind of sound you like and also what kind of music you are doing with it. I believe music along the lines of country which would be mostly guitar which is in the upper end of the spectrum and a solid bass would be where it would sound probably ok, if that's what you like and are going to play.
I also think a lot of people have gotten these and either just relied on someone elses idea that these sounded good, or never tried them in comparison with other speakers other than maybe the onboard speakers on their keyboards, none of which are really outstanding in the sound department, or since sound is so subjective, maybe they really do like this kind of sound, which to me I would liken to a boom box, of which I am not fond of that kind of sound either.
So, try them if you can, not just in a store or in your home, but in some bigger rooms and halls to see if it safisfys your needs if it does, terrific. If not, nothing lost.
I admit I have only tried them at home, and think they possibly may sound better in a bigger room and cranked up. But for me, the sound is inadequate enough for me not to have even wanted to test that scenario out.
Scott Langholff