I was doing some research on these turbos, and it seems that street driven wise they have very good capabilities, but does anyone know someone who has experience with them first hand?

Ive been putting a list together of what it would cost to build a turbo M30 setup, trying to find something that isnt too laggy. A few people recommended Precision turbos but Ive had two friends of mine who have had oiling issues with theirs, and one is on the 3rd turbo sent to him..