I've been using this thing for quite some time now, and it's come in handy with plenty of albums. What I've noticed is that quite often CDDB will return inaccurate data (or at the very least poorly formatted data) for the CDs I have, so before now I was forced to relabel them all by hand. Now though, I'm able to pop the CD in, import the tracks, then send it through MusicBrainz. Sure, as the last poster said it can have problems (it'll occasionally come back and say things like my track is from The Beatles when I really know that it's the opening theme to Wolf's Rain by Yoko Kanno) but with a little careful watching and a bit of patience this piece of software pays back in dividends.

One gripe I have right now though is that it does seem to be incapable of handling tracks in iTunes that are already named using Japanese characters. It's able to name tracks using those characters just fine, but quite often when I run searches on tracks that already contain katakana and kanji it'll say that the "server encountered an error..." or something to that effect and I'll be forced to manually change the data to English before I can run my search again. Altogether though it does perform admirably, and it certainly managed to inspire me to get involved with MusicBrainz.