I'm guessing that you're referring to the latest version, the "Mark IV", Keith.
As I understand, not officially imported over here and people have had to buy 7.5 joules ones from Germany and then have them tweaked.
I have been extremely fortunate to have tried three of them. One of them belongs to Richard Welham (ex Airmasters fame), one which belonged to the FWB importers and which WonkyDonky fettled and brought to a Boinger Bash and one belonging to Mach 1.5, tuned by Steve Pope.
All were lovely to shoot and had that real "air of quality"
They feel a little more "thumpy" to shoot than some guns with narrower bores and lighter pistons, but all felt very smooth and the triggers far nicer than the "classic Mark I, II and III. Comments from all who have worked on them were all very complimentary regarding precision and fit of components and quality of finish etc.
I'd definitely have one given the opportunity.