Just using the JJ-500 won't make you sound like Mr Burnel. For one thing, the amp doesn't do dirt, grit or drive of any kind. It's a really clean sounding amp.
It's loud and the 12 band graphic is really powerful. The Harmonic generator, or whatever it's called, is useful for getting a bit of "sparkle" (can't think of a better word) back.
I really like mine, even if I got another amp I'd keep the JJ-500.
The JJ is based on the MK-500, so think Mark King and not JJ Burnel and that is probably a better idea of how the amp sounds.