Yes, It's been on for a few weeks.
I noticed that the car seems to pull a little harder and feels a little smoother so overall I am very happy.
On idle it makes a funny wispy noise and you can also hear the turbo spooling when moving in traffic etc, sounds a bit like a police siren. Also sounds a little bit meatier when putting your foot down but not a hugh difference.
My mechanic made some modifications when fitting it so that I would easily be able to fit my old cat back on if needs be (MOT rules might change).