Used them at my previous school for just over 5 years with no cause for complaints. Competitive pricing & good support being two important factors. Be wary of 5 year deals though, my experience is that most machines, in a busy school environment, will reach their end of life by about year 4 and you will end up utilising Alto support for replacing knackered parts on a weekly basis!
Upgraded all the copiers with them before the summer and they added monitoring software which should order replacement toners & log meter readings automatically - no idea how well that system works as I've left there but it looked good in theory!