They were pretty good for re-chroming motorcycle fork legs when I was in the bike trade 8 years ago. I don't know what they are like for other services, but I guess pretty good if the fork legs are to go by.
Philpotts did industrial/hydraulic chroming first, bike forks was just a small sideline. Not sure what the balance is nowadays, since the bike side took off.
Sadly gone are the days of turning up on Sat with some unmarked tenners - now costs 2.5x what it used to..