Though I may be selling them soon along with my bcs zorst,  as I may be selling up for a Focus RS mk2 now.
Do it. Great cars.  Id be so tempted by a Meg RS265 though, and they are cheaper.
Mine was just about keeping up on the straights with a Mk2 Mountune FRS at Mallory although i guess the straights aren't really long enough for him to show off his extra power so much.  He took me out in it after, really nice guy, loved cars  

.  It didnt feel faster than mine tbh, marginally so if anything, but he had the Alcon/mountune BBK and the braking power was spectacular.  You could feel the LSD while it was cornering as well, 
What i will say though is whilst we were there I was managing over 10mpg extra than he was and the difference over a lap was marginal.  He fueled up his with Jerry cans a few times because it was doing about 5mpg lol