You should without a doubt have no issues with the Vagbremtechnic adapters if you have original steel hubs on your car.
Then I would recommend go for the kit Vagbremtechnic sells - these are tested on track and calculated to stand the stress the brakes put to the adapters. When it comes to tires and brakes you don't buy budget stuff!
Dave is no longer in charge for Vagbremtechnic and haven't been for a while now, instead it's a guy called Mike - aweomse dude!
Yes it's irritating these adapters was stated fit the VW Passat B6 that has the alloy hubs, but it is a honest mistake to think all cars build from the MK5 platform can use these brackets. However the stuff that still is making me recommend Vagbremtechnic is how they handle issues like this. I'm still haven't putted my 986 calipers on the alloy hubs since new brackets has to be calculated to withstand the pressure, so no rush here.
I'll rather wait a getting some brackets that are safely calculated than buying some bad brackets and having the brakes fail en sitautions where they are needed the most.