The BSH mounts are known for NVH, everybody who runs them even after break in has this major complaint.
The BFI stage 1 mounts do not have this complaint, I don't understand why more people don't go BFI as they offer 2 different stages for your tastes. The BFI stage 1 mounts for everything up to K04 are as effective as anything and offer the same performance as the most extreme set ups. I've only once seen an issue with a stage 1 mount and it was a 400bhp+ car on the forum, I've seen them in motorsports and other stage 3+ builds without issue since this incident. I'd love to see quantitative data showing the stiffer mounts offer a real increase.
The inserts do squat, I have summer tires and in 2nd gear at 20mph I spin violently with plenty of wheel hop. That's with a full stage 2+ car with all bolt ons and a energy suspension insert unmodified. I have a BFI stage 2 insert and the BFI stage 1 engine mount and the full replacement transmission mount ready to go in and I'll update with the results afterward.