Zim,
Different kinds. Some is very punkish, some is very far from punk. I'll name a few songs so you can look them up :
-Tears
-She Cries
-One Slowdance
-Hallow Cries
-Above Me
-Just a Memory
-Face The Truth
-Raining in September
Check 'em out. I think they are pretty damn good.
-RSI
Edit: Face the Truth starts off with really nicely played acoustic guitar. Hallow Cries has no lyrics, and it's cool kinda mellow. One Slowdance would probably be a hit by them. Very good. She cries starts off with bass I think, and it's pretty catchy... normal beat, sounds good. Above me is interesting... starts off kinda funny, then turns into really sweet punk IMO... very fast beat, etc. Just a Memory is another punkish song by them.. really good also, I think. Rainin in September is.. I don't know, I can't explain all these. Listen up for yourself. Great stuff.