It is true that the 912iS is a more complicated installation in some ways and requires the use of a computer interface to properly diagnose problems, and an electronic display to monitor engine sensors. I have 280 hrs. on my 912iS and about 4000 hrs, flying aircraft with the usual general aviation engines. If given a selection I would take the 912is every time. Some of the early 912iS engines had a gearbox vibration problem, including mine, but the issue was resolved with a modified lubrication system. Due to the computer control of the engine, cold weather starting is a non event. No carb, no primer, no mixture, no mags, two alternators, two fuel pumps, two injectors in each cyl, two identical computers with each one able to take over all function in the event of one computer failure, electronic audio and visual warning system of engine problems, and cabin heat available from engine head cooling system. Plus. uses standard automotive sparkplugs at about $2.50 each. Recommended fuel is mogas but can use 100LL. Weight is about 120 pounds. When I purchased mine the cost was about $2500 more than the carb version 912. So the up side is having a latest state of the art modern engine and the down side is costs more.