How much of the threading have you used? do you know what the min lowering is?I don't track it (not yet at least) or have any other coilovers to compare it to other than stock suspension so I can't really go into fine details, but it is one of the best upgrades you can do to the car imo.
Stock suspension just felt so bouncy on rough roads and bumps, now it feels nice and planted to the ground and has a better road feel. Looks great too, the GTI is lowered about 1.5".
I think the only thing to watch out for is that the H&R street performance coilovers aren't stainless steel, so they might not be a good idea if you deal with snow.
Almost went with KW or Bilstein but I did some research and each had their own issues at the time. I remember that Bilstein had a huge supply issue earlier this year so I couldn't get a set for the GTI at the time, not sure if that's going on still.
ANy reason you went with street performance vs street performance+?