I installed the PD kit on mine about two months ago, and it does make a noticable difference. I think it's a bit pricey for what you get, but no real complaints. All-in-all tho, good quality stuff, I'm happy with it, and I got the red wires and a big decal to stick under the hood so it looks very cool!
But, if I was ever posessed by demons, became delusional, had a psychotic episode and in the midst of it decided to by a 4-banger again... I would do it a bit differently.
I would probably do it more in a DIY fashion. Maybe a blaster coil and adapt it to the wiring, make the plug wires myself, the PD cap and rotor are just a better than stock set-up, so, with some effort and shopping around I could duplicate it pretty well and probably save some bucks.
Btw, I have a 2001 2.5 and I had to get the 31728-AH adapter for the coil, with that, the whole thing plugged right in.