I had the Fuelpak for 2 years, it is O.K. for a cheap and easy solution.
As popping on decel with the fuelpak still was getting on my nerves, I decided to get the TTS Mastertune.
Now I know the difference, engine runs absolutely perfect, no more popping and you can set the idle running below 1000 RPM.
I learned my lesson, because I had to pay twice.

 

The reason the Fuel Pack is no good past stage 1 is that you can't dyno tune it nor dose it have an auto tune mod.It will only take canned maps. If you do anything outside of pipes and a/c, it won't work. If you cahnge cams or heads, etc, you'll need to replace it.
I think you'll get a discount at Fuel Moto for being a member but don't hold me to it. There a great company anyway.