Goosetune is an easy remote mod. I'm in Harrisburg and had no issues with the remote install. Winfield spells everything out very well. Can't help with the other mods, but good luck sir.
For me, absolutely worth an extra 50 hp over the Ford Procal. Additionally, with the Cobb Accessport, you have the flexibility to easily uninstall the tune (takes a minute or two) for service or to switch back and forth between different fuel maps if you so desire. Winfield from Goosetune...
New or gapped spark plugs are not necessary. The "data logging" is just part of custom tuning. This is why you typically see higher HP numbers with custom tuning. Because it's more specific to your vehicle. I'm 52, not super techy, and I figured it out no problem.