Frankly, I've had the FC ORP in for the better part of a year now(yes it includes the cheater)and wish I hadn't done it: it broke my flex pipe and made me fail emissions testing; I'm in the market for a high flow cat.
Actually MEAN, since you have Hypnotic's flash for the car, the second O2 sensor, which is the sensor you would use the cheater on, is disabled. In other words, you don't need a cheater. Also, I second the RT ORP quality. While I haven't seen or used FCs, the things I have heard about it have all been negative. I picked up mine from Hyp. for about the same price (didn't include the O2 cheater) and was very impressed.
You will really like the RT ORP it is really good quality. Not to mention the people at McNews are great to deal with. I think if I had to do it over I would go with the Hi-flow cat or maybe just a cat back. The ORP is a little loud for my taste!