Depends what you mean by too good to be true.
It is a very crudely written generic remap. It will give you a decent power increase (though not quite as much as is claimed). The 180hp map is quite aggressive in terms of boost levels and anything other than an excellent condition turbo/vnt will likely result in overboost and a short lived turbo. Throttle control is pretty much on/off etc etc.
Not to mention that if you get the flashing part wrong using the cheap MPPS clone and you don't have the means to recover the ECU then you'll be without a car etc.
If your car is healthy and you have no issues flashing the map, then bang for buck it's pretty much unbeatable