Anyone used a company called Zi Motorsport (ZAVIZ International)?

I used the one in Wrexham by proxy (the garage I took my car to didn't know how to repair, so the bloke took it to his friend in Zaviz) but they didn't really have a clue how to sort my turbo actuator problem out properly (cue several visits to have the adjustment nuts adjusted). They also did a remap on the car which really improved performance, in an effort to stop the limp mode, but the problem was really the turbo actuator so ultimately didn't help.

NB I had the remap taken off as I didn't ask for it and didn't want to pay the extra insurance premium.