Just had a look on their web-site - for a Phase 1 car a chip (not a re-map) cost £200 for an extra 10 to 12 bhp, which on the face of it is pretty good. However, you'll note that the rev-limit is increased to 7,500 rpm. I'd be worried that the extra 10 bhp simply comes from the raised rev-limit, and is not shown across the rev-range (I don't know if that's true or not). If it is the case though, you're unlikely to ever get to use that extra power unless you rev the nuts of your car.
In every step, I hear your sobbing
Dare I break the shade with one caress
Dare I trespass to lift the veil
To touch the lips so soft and frail
It may be that love comes once and once only, preceded by rehersal, followed by regret.
Know well that however right a man may be they always find the fallen one guilty.
All that is required for the triumph of evil is that good men do nothing