These are superb mini speakers. They produce an excellent sound, and not only for their tiny size. They are well constructed, the battery lasts long, and they come with a nice carry pouch, and have a tidy single cable which doubles up both for charging the units as well as connecting to portable media players.
A major piece of advice I would pass on to fellow Amazonians:
Because the speakers are actually quite good, they ruthlessly expose poor quality music files. I found that with many of my low bit rate music files (say 55kbps to 100kbps), the speakers "distort" at anything above 70% of my mp3 player's volume. (In fact this is not really the case; the speakers are simply exposing the weaknesses in the music files).
On the other hand, with all of my downloaded music from iTunes (nicely encoded higher bit rate files) and ripped music from CDs (excellent quality 320kbps mp3 files) I encounter zero distortion. With quality files, the speakers happily pump out very loud, well articulated music all the way up to the maximum volume of my mp3 player(s).
In short then, if you think these speakers are "distorting", do check your music files.
Very satisfied with my purchase, overall. I can't say that these compare to larger sound docks because that would just be fanciful, but the fact remains that these are superb mini speakers (emphasis on mini), are more portable than all the sound docks I've encountered, and sound pretty good to boot. Good stuff.
A last word: make sure you "run" them in. Like all speakers, they improve with use.