We need someone to actually buy the Blitz Supercharer, get it installed and then tell us all about it. But when you're talking about that much money, everyone wants to wait to find out about reliability and so on. I'd go out and buy it tommorow because Blitz are one of the most reputable tuners in the world and they've probably thoroughly tested it, but I also have to think about my three year warranty.
kind of hard for people to buy it when blitz isn't selling it yet (it's only available in the jdm right now). there are only two blitz supercharger equipped celicas in the states right now (i know you live in europe-just saying), and thats still not with reprogrammed ecu for american-spec cars.
the 40 whp gain shown in the dynos above would probably be better once blitz reconfigures the ecu for american grade octane gas.