Any question answered...

The difference is noticable, I got mine from an airport duty free for about £50, and cutting hair/trimming beard is noticably better, one thing for sure it doesn't 'pluck' your hair every now and then when it didn't cut it properly.

I've not found this with my cheap trimmer. The only issue I've had is that, after a fair amount of use, it's started eating the plastic grade heads. Having looked around, I can buy a new one (only use the one) for £1.32 shipped for free from Wahl. So not big deal :)

I'm sure a more expensive one will cut better, I may consider one if this conks out on me. As it stands, it's saving me £12 every time I use it (and saving me from an awkward barbershop conversation/awkward silence).