Is it the monitor only or does it have The Juice with attitude as well? $1000.00 seems high for only the CTS2 monitor. I'm not trying to rain on your parade, but the attitude can void your warranty. Dont get me wrong, I'm running EFILive on my 07 C&C and it still has emissions in place, but it is out of warranty. Just some friendly advise, install/connect the EGT pre turbo so you don't melt a piston if your running the Juice with Attitude.
As far as learning what "what" is on the CTS2, have fun and play around with it. All the monitor does is get the info that the OBDII gets from the ECM and shows it in a nice format in digital on the monitor. I've been wanting to get a CTS2 monitor to add to my EFILive, but my Kiwi Wifi II works the same, but I have to see my gauges through the Kiwi Wifi II. BUT THE BEST FEATURE, AND THE ONLY REASON I'D PAY EXTRA, is the fact the CTS2 shows when the cummins is in regen.