I have had the UTCOMP Pro fitted to my car for a few years now. I have used every input on the unit and is particularly useful to connect a wideband O2 input. Overall I am pretty satisfied and there is nothing else on the market to match it. However if you want to make use the fuel computer part of it, you should look elsewhere as this part of the UTCOMP is poorly designed. Firstly, if you want to use gallons instead of Litres for your fuel tank capacity, you can only input them in whole numbers, pretty bad for any accuracy unless your tank capacity is exactly to the Gallon. Secondly, the fuel sender input to the UTCOMP can be calibrated for Empty and Full voltages ok, but the "Fuel Remaining" and "Remaining Miles" displays fluctuate so much when driving that they are totally useless. There appears to be no dampening of any kind on these displays (unlike a normal analogue Fuel Gauge). When this was pointed out to Reveltronics they said that "Fuel Remaining" and "Remaining Miles" were calculated from the mpg rather than relating directly to the Fuel Tank sender signal and that there was no workaround for this problem. So really, the only useable displays of the Fuel Computer part of the UTCOMP is "Average MPG" (which can be calibrated over time pretty accurately) and the UTCOMP "Fuel Tank" capacity screen itself which appears to be adequately damped. You will have to calculate the "Miles Remaining" yourself on a calculator if you want any form of accuracy. I was somewhat disappointed with this part of the UTCOMP. I was hoping that it may offer the same accuracy as a production car fuel computer, but if falls way short of that unfortunately.
https://forum.reveltronics.com/viewtopic.php?f=28&t=127
https://forum.reveltronics.com/viewtopic.php?f=28&t=265