Hi,
I had my car chipped by APR last year. I got the 3 settings, standard, 95 and 98. I use Optimax in the car, (which makes a massive difference anyway - just run 2 tanks through and you'll notice a difference !) and always run the car in 95 mode.
You may ask will you notice a difference ? It's like sitting on a rocket ?

. I've had friends in mine who have Impreza's, Porsche's and BMW's, they have been in my car and ALL were impressed with the performance. 0-60's will be about 6.5 secs !
I love it, every now and then I change it to standard mode to see what a slug I used to have, it's like driving with flat tyres, honestly !
I had insurance with Admiral, they wouldn't insure the car, but I moved to Greenlight insurance and they were excellent, I chose to inform them, it's up to the individual.
At GTI Int on Sunday they were offering 5 hours of chipping for free, I shall get the info for you.
Prepare to get your wallet out!
Sav