I had the RST Gila T6 on my Trek 4300 when I bought it new. I replaced it with a Rock Shox J3 because the RST was too stiff for me. I had it set to the softest setting and I still didnt like it. The J1 is pretty similiar to the J3, the J3 just has a lockout and rebound control. I have had the J3 on for over a year and I am pretty happy with it. To me the RST is junk and isnt any better than a rigid fork.