It drives totally different because my fuelling has been corrected and seems very smooth. Having my mods on before the tune made my car run very rich and the tune sorted it out. Doesn't sound any different just more power
I paid £511 including VAT. The money from the sale of my car pc is basically going to cover this so to me its a pretty free tune.
Also as i now have the Up Rev tune i can go back any time with more mods and do simple adjustments to the map. Just pay for the labour