Interesting. I think I'll give it a miss then! I'm always wary of these alleged 'performance enhancing' apps. I guess for what might only be a small improvement in performance it's not worth the bother. Thanks for the replies.
Does anyone know of any performance boosters that are actually worth bothering with? I mean my phone runs okay, but it's just that temptation to squeeze every last bit of pwer out of it, ha.