well, obviously this is the prequel to GTO, i got lucky and was able to get it off the net and got a chance to watch it, i think now its pretty difficult to get it. anyway its not as good as GTo, but it's a treat to find out the troubles that Onizuka and his friends get in.
as for story goes, its not the best nor it makes "real" sense, but it was sure enjoyable, partly cuz i am a GTO fan.