Have had my green Kroc for several days now. My minimum diameter curves are 72" and it runs quite smoothly on them. Pantographs are automatic with direction of travel, and are quite detailed though delicate.
The capacitance circuit (NO batteries!!) - something LGB employed quite a few years ago - takes a bit of getting used to as it charges up - 15-20 seconds or so, but is very reliable.
The European whistle is spot-on and the German conversations in PFA mode are a nice touch.
The engine is somewhat of a challenge to lubricate - turning it upside down with those delicate pantographs is a bit tricky, bit not impossible.
Nicely detailed engine and great LED lights that change color with the direction of travel.
The bell appears to be an automatic type such as might be found on an electric prototype.
This engine, along with my VL Hudson and "Brute", has most assuredly become one of my all time favorites!