I installed the Horst probes while we where at a campground one day. Took all of 20 minutes. They sure work great! Highly recommended. Too bad they don't put them on all RVs as a standard factory item.
If I had one piece of advice, it is that the wire that attaches to the connector that goes onto the sensor is a rather small gauge and is fragile. Make sure you don't twist the wire or put strain on it while taking it off the old sensor or hooking up the new one.
If buying on Amazon, gotta watch that you do not get a factory warranty sometimes and there is NO customer service number to call if you have any issues. We've cooled off on Amazon now because of this.
Gil & Deb & Dougal the Springer Spaniel