When you could get a $25 OBD 2 bluetooth reader, and a $5 app (for android phones) that does everything right on your phone. I picked one up, installed the torque pro app, and paired it with my S5, and drove my dad's car around. Realtime Cat temp, O2 voltage, manifold pressure (boost),fuel trim, ignition advance, pretty much everything but oil temp. It was the coolest thing I've ever seen. I just need to set up the gauge setup I want for my focus, and get a dash mount for my phone. I'll just leave it running all the time. Iz so cool. Scangauge is $200+, this cost me $30 and does everything right on my phone.