I have had no problems with my VersaGrate. It was a bit noisy when I got the stove (used), but found that lubing the two bushings for the shaft quieted it right down. What I was hearing was the gear noise from the gearbox, because it was being strained excessively by friction. Now it is hardly noticeable, and can't be heard above the stove's normal sound. Lubing the shaft, and the auger bushings reduces the load on the motors and gearboxes, extending their lives (true for any stove).
I have never seen a log set for a St Croix, but the flame in the pot is nice to look at by itself. The burn pot is rectangular instead of round, and tends to fan the flame out, making for a nice visual.
Back when my VersaGrate was noisy, I disconnected it, and saw no real difference in the stove, so suspect it's not really necessary unless you're burning corn.
My stove is a workhorse, easy to clean, simple to maintain.
The Croix web site has some excellent videos on maintenance, and a cutaway diagram of the stove's internals which helps one to understand what and where to clean. The stove has no thermocouples, etc., just simple and inexpensive snap switches.