I agree with A5 that if you get a JB4 (what you're asking about), splurge for the BT and App. If you think you would be happy with a JB1 (really named Stage 1), then by all means, keep it simple, get a JB1. Really the only reason to get a JB1 is if you are on a budget and you have a Red Sport and you're completely happy with keeping the boost at 3PSI over stock. But if you are Silver Sport and/or are looking to start changing and customizing maps, step up the JB4 with BT. Don't mess with the data cable. You can start with a JB1 and go JB4 later if you'd like.
2017 Infiniti Q50 Red Sport 400 RWD, Iridium Blue/Black leather
1999 Nissan Maxima SE, Icelandic Pearl White/Black leather - Supercharged 4AT (322 WHP / 307 WTQ)
2001.5 Audi S4, Santorin Blue Pearl/Black leather - Bi-Turbo 6MT AWD (300+ BHP)
2003 Acura TL Type S, Metallic Gray/Black leather - 5AT - Daily Driver