The installation of the SG2 is simple: attach the OBD2 connector to the DLC port and attach the RJ-45 jack to the SG2 unit. Routing the cable is really up to the operator. I chose to do it in a crude manner because I don't plan to make it a permanent addition to the car. I zip tied the cable to my HVAC vents and anchored it to the empty traction control hole behind the glove box.I used 1 of the provided velcro kits to affix the SG2 to the top of my steering column so that it is right below the instrument panel. It actually blocks my view of the shift indicator array, although I can still see it clearly if I lean forward.The update rate set at FAST is still rather slow and that is to be expected with the outdated OBD-II network. The "fastest" aftermarket scan tool that I have seen is SCT's Live Link for Ford / GM / Chryslers. If you want anything faster, you are going to have to borrow an OEM's scan tool system.The X-Gauge interface is a bit cumbersome since you are restricted to using 2 buttons to enter alphanumeric characters while if you pause for anything more than 10-15 seconds, the SG2 shuts down. According to Linear Logic, they are working on an updated SG2 with datalogging features so hopefully they incorporate a PC interface to speed up programming and setup times.I have it set to monitor instantaneous MPG, RPM, Vehicle Speed, and a gauge that I frequently switch depending on my mood. I am monitoring the torque converter slip ratio. Whenever it reads below 1.00, it means the torque converter is "slipping". Above 1.00 means the output side of the converter is spinning faster than the input side and theoretically it could just mean engine braking with some torque converter slip. You can program custom X-Gauges to monitor gross engine horsepower or torque input at the transmission.I had previously used a Garmin Forerunner 101 to check my GPS vehicle speed and compared it to my speedometer readout (2000 Ford Crown Vic with mechanical speedometer). It revealed that my GPS speed was about 2-3 mph slower than the speedometer indicated speed. The SG2's vehicle speed readout (from the Vehicle Speed Sensor PID in the OBD-2 system) is approximately 2-3 mph slower than the speedometer reading and I am assuming this is the same readout as my GPS (I didn't get a chance to verify this yet).Some of the gauges I like to monitor are Coolant Temperature, Intake Air Temperature, Transmission Fluid Temperature (XGauge), Torque Converter Slip Ratio (XGauge), Gross Horsepower (XGauge), RPM, Vehicle Speed, and MPG.I still haven't been able to figure out how to work the trip computer properly to display averaged fuel economy. The instantaneous MPG is more important to me because I want to see if anything is not working right on long cruises. I have often wondered if the torque converter was locking properly when I use cruise control or when cruising on the highway.The data collection stability is impressive. I never ran into many problems with Car Code or SCT's Live Link, but SG2 is just more convenient and compact. The backlight colors are interesting as they allow you to choose 4 different values of each RGB component (or 64 possible combinations). I have it set to R=3, B=0, G=0 so that it resembles Pontiac's interior lighting (I drive a Ford).My only real complaint is that there's not a better way of attaching the SG2 to the car. A suction cup mount for the windshield would come in handy since I could mount it near my line of sight without relying on adhesive-backed velcro. The interface is quite intuitive but I would have liked a way to program the X-gauge more easily, like via a PC interface.Bottom line: The SG2 is a great deal if you are interested in data readouts for your car. There are cheaper ways of pulling DTC codes, so the only real usefulness of SG2 is the "realtime" PID monitoring and the trip computer for cars that do not have such devices. If you know someone who is a bona fide gearhead and drives a car made in 1996 or newer, they may appreciate the SG2 as a gift.UPDATE:While the ScanGauge II provided a useful feature for cars without trip computers or onboard monitoring for various PIDs, I have noticed that it began to malfunction more frequently. The gauge readouts began to "flicker" between PIDs. For example, monitoring IGNition, the IGN began to switch rapidly between HPR. Just recently, the entire ScanGauge II shutdown while I was driving. It would refuse to reconnect with the OBD2 network. When it did find a connection, a lot of the text was garbled and it lost all of my trip data except for the total mileage. My car normally maxes out on 300 miles per tank of gasoline, so I was bewildered when the SG2 said I drove over 4000 miles. Other SG2 readers have reported similar quirks, albeit not as serious as the self shutdown and data corruption that I experienced.Many newer cars already have features built-into the car. The Pontiac G8, and Nissan GT-R are two examples of cars that have very developed "trip computers" while many other modern vehicles like the Pontiac G6, have trip computers that can monitor most of the fuel-related data.