I have a R53 Mini Cooper S and I am interested in a performance chip. Any recomentdations? Does anyone have any feedback for InMotion stage one chip?

Your money is better spent having a 15% reduction supercharger pulley fitted.

Agreed, fitted a 15% one last weekend myself and it's a cheap but effective upgrade.

I got the Cravenspeed one and their puller from Lohen along with new plugs and belt.
Plugs and belt were due anyway so it was very cost effective.

Lots of the tuners will fit for you, I just like to do most things myself.