The only issue I have with the electronic sensor is that it does not discriminate enough, as you have read as well rdbonds, there are instances where the units have gone in the deploy mode encountering bumpy road surface, and that is not likely to happen with the tether cord.

So what it boils down to is the inconvenience of the tether vs the freedom of the electronic unit (with the potential of unwanted deployment) me I take the umbilical cord, heck I had one from birth choices, choices.

But for the pennies per day, a lot of peace of mind, and cheaper than medical bills, and pain and suffering.

You all be safe.