I've got the normal pilot powers and have done about 2500 miles on them and will probably get another 2k out of the rear, good grip dry or wet, much more confidence inspiring than the D208's previously fitted, and I also managed to get mine for £120 plus fitting off ebay!!
I had 2ct's on the R1 and got about 5k out the rear and 8k out the front. Then moved to pilot power and only got 2.5k - 3k out the rear, so deffo worth the extra unless you get a really good deal.
Cheers guys, I have a brand spanking new 2ct front sat in the garage so wil probably buy a rear to suit & get them fitted just in time for the sunny summer, Fingers crossed!
got a pair of pilot powers for 150 from a place called round and black on ebay they are in dunstable and they are pretty good you can go pick or they will deliver. i get around 4.5k out of the rears