Mike
It won't add any power over an Xcal3. You can't change tunes on the fly. if you want to use any of Livewire's functions, it has to be plugged up to your OBDII port. It's basically a flasher with some bells and whistles. I'd rather see you save the money difference and apply it to your custom tune.
The absolute one thing you never see or hear me say is to tell someone to spend needless money to meet their goals with their car......just ask Jeff about that. I never liked that when someone tried doing that to me in the past, so I won't do that to anyone else.