This will dramatically improve the trigger feel of your Spyder, it will also make you use a lot more paint. Mako Paintball handles all warranty jobs on this, and they are great to deal with. The modes of fire are awesome, once tuned your marker is a totally different animal, the feel of the grips and the look of the trigger frame add greatly to the style factor.
Weaknesses:
The fact that you have to deal with 3 screws to get to the battery in the grip, this becomes a mute issue if you get a wall adaptor, you'll never have to mess with your battery again unless you play an extra long 48 scenario game. The trigger is sweet but it has a bit of side to side play, I'm sure Mako paintball can alleviate this. Also if you try to go past 11BPS with the conventianal electro hoppers on the market today, you will get ball chop, so try to keep it at 11BPS and under or try a Warp Feed.
Conclusion:
This trigger frame is Just great, I really dont know why people say there are quality issues, it's constructed pretty good. Although the grip screws look like they can strip easily (a hela-coil can fix this), the rest of the construction is equal to if not better than the Centerflag version. I'm sure if it wasnt for the whole Boo-Yah owner skipping town thing, there would have been none of this negative feedback, It's great to see my Spyder keeping up with all these expensive markers. Mind you it wont feel or lay out paint like an Angel or Cocker, but it is a vast improvement over stock or your average blowback marker.
