I'm totally into them. They bring back my punk days when I listen to them, but they've also got all kinds of other stuff going on. I feel like I can hear a ton of influences when I'm listening to them, which grabs me, but they're pretty original which keeps me listening. It's pretty accessible for being as odd as it is, which I guess is why they've done so well in Japan (this isn't the kind of stuff that does well in Japan, generally speaking).
Also, I found out you can order all their CDs from Otaku.com! About $17-$22 per CD. A bit steep, but with combined shipping it might not be so bad. I may go for the entire discography at some point soon if I get the chance to hear more of their early stuff.