i have the SPT shifter as well, and yeah, it kinda sucks. My problem is 5th. Maybe 1 out of 3 times it won't go through the gate at speed ... i have to backout .. pause .. rev .. and then it goes in.
If you're having trouble getting it into first when the car is stopped, the key is to put it into 2nd first, then 1st. Works every time, I had that issue real bad with my RS and then I read that, and problem solved. I believe I saw that on here, the post was something like: "when i drove trucks in the military, they taught us to put it into second first, then first." the worst thing you can do is force it in