I only used the electronic one from Sporty's. I found it very easy to
use once I learned it's functions. I will say that the first or top
line readout is very hard to see, and you have to hold it in a certain
way to see that line easily. If they could "redo" the screen to make
it more readable, it would be great. My middle aged eyes could use
the help.

I agree that it is mainly used for training. I haven't taken it out
of my bag yet since I've gotten my ticket.

Doug