Steve,
I wouldn't worry too much about the effectiveness of your mountune kit. Its a very impressive package that provides real and proven gains over the range. In fact, this is why I'm so cautious over the 185 package as it just looks to be too top heavy.
Yes, you could get similar gains in power, across the band using off the shelf kit but what you are paying for with your mountune kit is development time, exclusivivity and most importantly, ford backing.
_________________________
Eco-warrior