yes I did see an increase in mpg a bit
but it was pulling power and overtaking gains that impressed me
mine was done at Yorkshire remaps and these guys were excellent, professional in every way even made me several cups of tea lol. I would have no issues recommending them
downloaded map, sent off for individual re map ( not a generic copy ) and re uploaded new map when sent back
then took me for test drive in my own car which does put a big smile on your face..
very very good price too :-)
hope this helps and is of use :-)