We have struggled for years with various techniques try to get our child to be dry throughout the night and failed miserably.
We have used this alarm for over a month and we are consistently seeing dry nights, it took a few nights to get to grips with it as said child is a very heavy sleeper but they got used to it and to start with was waking up a few times in the night with the alarm going off, to which they got up and used the toilet, we are now at the stage where we have only had one or two minimal accidents in the last 3 weeks. We have found it to be very sensitive and occasionally goes off if the tiniest bit of moisture gets on it so you have to make sure everything is very dry, we are using it between 2 pairs of underwear.