R/S is attempting to get "geekified" again.
I would recommend buying a used oscilloscope. To me it's the best logic probe and you can actually see what's going on. But a logic probe does have its place and I use one as well.
That said, if you are buying one, get one that has audio and not just LED indicators. That way you can focus on where the probe is touching and get audible feedback.
Searching this forum will yield recommendations from the past. This topic has been covered several times.
Bill