1.6 CR 105bhp emissions fix rollback?

Hey

I've read alsorts about the emissions fix but cant find what im after, so i was wondering if anybody has had the EA189 done on their 1.6CR and then done the rollback to get rid of it? 

I've got a Caddy 1.6 which has already had the update before i got it. I've booked it into Shark next saturday to have the update removed. 

Question is... is it likely to change the driving experience? More power or smoother delivery? 

Atm it seems a little laggy compared to the 1.9PD im used to. 

Cheers!