I've got an RCPro MK2 as well. It initially took some setup time, and some of the current hassles I'm facing are because 2G cellular is no longer supported by the carriers (not Autosports fault) and I can't upgrade for 3G or 4G. This, obviously, isn't an issue with the MK3. If you can follow instructions you shouldn't have too many issues. If you've got a CAN BUS and/or OBDII vehicle things are pretty easy. With non OBDII you have to a little more effort to install sensors and wire them, but that's also not all that difficult and is pretty well supported with their instructions.
As far as dashboards, idiot lights, etc... yeah, its pretty freaking great. You can use cheap tablets (they actually have a deal with a Verizon rep for a free tablet with their $10/month data plan contract), phones, even Raspberry Pi's as the dashboard. And you can do config with either Macs or PC laptops.
There's a super active community and Autosports Facebook page is constantly having people post cool things they're doing with their systems, or problems they're having (which typically get solved REAL fast from either other owner input or directly from Autosport). They're constantly developing new features based on user input.
Strongly recommend.