highsports are cheap, and u get what u pay for.
I bought highsports on my LC - and I'd make sure you get warranty etc on them (ie don't buy secondhand)
I've now seen 4 sets of FK's (not just highsports, silverlines as well) that have a bit of "play" in them, and this can lead to MOT failure, so I'm told. It may mean shocks have to be rebuilt.
Mine have a slight amount of play in them, which I'm not happy about, but at the moment they are not bad enough to get anything done about it - will be checking on them in a few months.