i suppose for £250 it is'nt bad really for a extra 10bhp and 13nm of torque.
ok you can get more power and that from the bits you mentioned like "full exhaust including mannifold and sports or decat then 60mmtb + custom map. Hope to see 170+", but when you weigh up the costs, i bet its not far off of a couple of thousand pounds for that lot b rand new.