Yeah, I definitely agree with Lee. Philips clippers or hair trimmer doesn't give a smooth clean shave.
I'm using headgroom, which I expensively bought and I regret doing that. Will not recommend it to anyone.
I bought these having used another Philips clipper for some years. I am tempted to say they are rubbish; but they aren't that good.
They don't cut well and I have had to replace them - not to be recommended at all.