Starting Strength is a great program, but I can't understand how beginners are doing power cleans without any kind of guidance from a trainer. Power cleans are really hard to learn - it took me months of going to Olympic weightlifting classes to get even close to good form on them. How did you manage to learn this from a book?

Also, you need to be doing them on a lifting platform for the end of the lift, when you have to drop the weight all the way to the floor. Not too many gyms (in the UK, at least) seem to have these.