I found it didn't really do much at first and I think I need to redo the car again at some point as there are some deeper scratches that remain but like you I didn't want to remove too much paint.
The pad combos and natty blue wax was easy to use to get a dust free finish and the car takes about 20/30 mins to wipe down now so well worth the effort.
Main things are read/learnt are ensure the car is super clean (clay bar, etc) then do small areas applying reasonable and even pressure, cable over your shoulder so it doesn't drag and keep the pad moving. Using a quick detailer to keep the pad moist helps prevent marring and reduces the amount of compound you need to wet the pad. Don't go near any edges either and be careful going over areas that have been repaired in the past
I practiced on my bonnet as it had a few stonechips that way if it messed up I'd have got it painted for £200-£250 and put it down to experience plus would have removed the stone chips

man logic...