They have some neat songs.. in a laid-back dreamy 70s sorta way. I like their quirky lyrics most of all. If you like them, check out Al Stewart.
I like A horse with no name. Very relaxed song, I also had one album of them, but it didn't had the same impact I think.
I think I saw them in concert at one of those free summertime events. I remember the Horse With No Name song.