Hi Bob,
If you've got the money then go for it. I've had mine for about a year and had no problems.
Easy to fit, bolt straight on and so far no signs of wear/fading. They are a bit louder than std, I ride without the DB killers and they're not too loud until you hit 6000rpm and then they're fantastic - been a sports bike rider for years though.
I did my research off youtube beforehand - plenty on there. Pics of my bike are here in the gallery.
Bought mine direct from Germany, prompt delivery etc.
Good luck
Charlie.