I'm not telling anyone off! If Brendy gets good results with a £34 silverline thing, good luck to him. But put it this way, I believe you get what you pay for and given the choice I'd pay £170 again for my Metabo any day of the week
Most people can learn to use anything - PC, rotary whatever. But the rotary is not a pick it up and get great results instantly, as Rob says holograms are just one issue and probably the least of your worries if you feck it up.
A PC is a relatively safe & easy to use machine that can achieve great results. The rotary can achieve slightly better results, slight faster and a fair bit easier with practice, or it can be the first step on the ladder to new paintwork.