Just read all 9 pages of this and I just wanted to throw my

in...
1. gmtech16450yz has some good points on a lot of things mentioned regarding the EFR. Out here in Metro Detroit, we have quite a few shops that have iterated more or less the same points he has made.
2. For all the research I have done on my own prior to reading the 9 pages of this thread, I was already leaning towards getting the PAW EFR kit and have seen the benefits compared to the GT2871R. I talked with Spike in NY and he said that he loved his DDM kit, however, he still wanted more after he had it for a bit. When I talked to him, he didn't have the solstice anymore. It was long gone and he had his new Challenger with a full exhaust and a supercharger kit on it. So needless to say he got impatient lol.
3. ZZP, which is only 2 hours from my house, is exactly what elff and Sky888 say. They offer a few good products, but also quite a few bad ones. The folks who know this company, know what to stay away from.
Horsepower is addicting for sure. If it was me buying a kit, the EFR, for me, is a better solution because I may be going up in power after that initial kit and rebuild the motor. So investing into the new manifold, etc, etc, is what would be best.