The original digital machines (incl. TL's in Australia) only had a couple of cycles - i.e. Turn the knob to "Normal" and it washes for X, rinses for X and thats it. No adjustment.
These days they build in far more customization ability, and thus I would digital controls these days - as they're more feature-filled than the previous generation of even electro-mechanicals.
Reliability is yet to be determined, aside from the usual snags which John can state if need be. Its said though the timers on the machines were never all that good to begin with, so digital might be the solution.