Just be careful when using it!
I've always used a Sebo vacuum but recently bought a used Kirby G4 that was going for next to nothing locally.
Was using it at home last week where I have deep pile carpets so I set on its lowest setting to get down into the pile.
Whilst vacuuming I twice hit some stair spindles taking tiny chucks from them caused by me not taking care and the fact that it has a heavy metal casing.
Then moved from the landing into the bathroom (without adjusting the height setting) where we have a dark colour Lino and noticed 3 or 4 centimetre wide white marks after a few feet, after stopping to check them out I realised it was the rotating brush of the vacuum whipping small pieces off
So it is either extremely powerful (especially on its lowest setting) or we have very cheap Lino
But lesson learnt and thankfully it was in my own home and not a customers where I managed to repair the Lino myself.
But on the deep pile carpet, wow!