I was a bit skeptical in purchasing this ST suspensions seay bar as the price was too good and I don't know their reputation. After learning they are a division of KW I felt better. I used the rear sway only and it has made the handling characteristics of my 2011 GTI much more neutral. Significantly less understeer. I installed with new VW bolts as this kit comes only with bar, brackets and bushings. Used no lube as suggested and hear no squeaks so far with about 4000 miles on it.
Worked well but not Perfect
The rear sway bar installation went perfect, no issues at all. During the installation of the front sway bar the supplied brackets were not correct for a 2012 Mazda 3i. I had to reuse the OEM brakets to make it work. The supplied brackets were not wide enough between the bolt holes nor were the bolt holes large enough for the OEM bolts. Once all was installed everything went well. Normal squeekyness from fresh bushings and paint.