When reviewing the PlayDock MP3, more than anything I was struck by how much better the portable speaker options are for iPod owners than for owners of other players: If you’ve got a non-iPod MP3 player, the PlayDock MP3 is without question one of the best “transportable” speaker systems on the market in terms of convenience, construction, and sound quality. However, if your player is an iPod, the PlayDock MP3 has tougher competition. For example, to listen to your iPod on the go, you’ll likely prefer the carry-friendly design and iPod-securing dock slot of the less expensive iBoom or the more capable iM7 — these systems were designed specifically for iPods, and it shows. Still, if you can do without the iPod-specific functionality, the SoundDock MP3 is a solid system, especially if you just want something to transport between stationary locations. Because our focus at Playlist is iPods, I give the PlayDock MP3 our 3-Play (“Good”) rating; those with other players will likely find it 4-Play (“Very Good”) worthy.