I have the 4000 on my Bowtech Pro 38 ( left hand) and i am competely satisfied with it' s operation and the quality. I also like the added micro adjustability of the 4000 over the 2000.

I had the 2000 on my g2,,, worked woderfully for a while then I had problems ,NAP sent repair parts out and this broke again , after 3 times breaking and following instuctions to the letter on setting up.NAP sent me the 4000 !! I' ve had it install a year in march and NOT 1 problem with it !!! once it was set up busting nocks with them and robin hooding arrows can' t shoot more than 2 arrows at a spot!!!! NAP customer service = AAA++++ NAP product = AAA++++

I have the qt4000 on my havotec and just love it. easy to tune, quiet, no cleance issues. i recommend this one but if you have a hoyt tec bow you need the rest plate so teh rest is flush to teh side of the riser.

I just put the qt2000 on my bow and i really like it,wish i would' ve got the 4000 for the micro adjustment but i' ll use this one for awhile,then maybe i' ll break down and buy the 4000.