Using detergents (body wash, etc) is really preferable instead of soaps - you have to clean way less often and you don't get that really sticky scum at the bottom of the shower.

If you do a really serious clean with domestos and scourer and get it looking great, you can keep it clean fairly easily. Make sure all suds are rinsed off after the shower and use a little spray of window cleaner and a squeegie to clean and dry the surface. Note that I say "you can" because, although I did keep the habit for a while, I've gotten lazy and left it out lately.