Prob half the PMs I get now are about this kit, for the outlay I think it's great value.
I've got a tame porsche specialist that let's me have some affordable calipers (non at the moment) on occasion....the buzz when you go to collect the calipers and there's a nearly new chunky set of Porsche OEM pads in there is just ace!
The prices of calipers are coming down a bit as well I've noticed
Its an adaptable kit as well with cheap consumables, good pedal it works on show ponies and track cars, I think Rex has proved that it does have its limitations on track as all brakes do but until you outgrow it like Rex has its a great kit and setup with hardly any downsides that will work enroute Sainsburys or the Nordschleife...
Worth also mentioning that I have carriers that also work on the lightweight S3 hubs, so anybody wanting to focus on unsprung weight and better handling also has this option.