We used the Wet stop 3 for our ds who was wetting through his pull up everynight. I couldn't find pullups that were absorbent enough, so we had the expense of that plus doing laundry every day. He was just turned 6 at the time. Honestly I chose the wet-stop because it was cheaper then the Malem, and the first one we got the sensor didn't work, but we were able to get a replacement. When that one came it worked very well and within 3 weeks he was dry

Honestly the best money we have ever spent

. I hope this isn't too long, but I found the review I posted on
Amazon a few years ago and I'll copy it here in case anyone is interested.
I truly cannot believe the results we've had with this alarm. Our 6 year old boy had never had a dry night in his life. A few months ago we tried the method where I would get up and wake him up and that was a disaster, I was waking him up 2 times a night and he would still wet 2 or 3 other times a night. The short version is that the alarm went off 3 times for the first nights, then 2 times and on night 10 - no alarm and my son got up on his own to go and has done so every night since!
The reason I gave the alarm a 4 instead of a 5, is because the first alarm we got didn't work at all. We bought the alarm from the Bedwetting Store and they wouldn't help at all with what they said was a manufacturing issue. Then I called Potty MD, who said they would replace it, but they wouldn't pay for return shipping since I didn't purchase it from them. It's frustrating that since it was obviously broken to begin with they should have stood behind their product more, and then it took over 2 weeks to get a new one.
Long version: The first couple of nights the alarm went off 3 times, and my son was pretty wet, but each time the alarm went off he was standing next to his bed when I got into his room. The next 5 or 6 nights, the alarm went off 3 times, and then 2 times a night, but almost everytime my son was able to stop himself pretty quickly and finish up in the bathroom. Then we had 2 nights that were tough were my son didn't get out of bed when the alarm went off, although he did stop himself from urinating further. I didn't hear the alarm as well these nights because he had taken it off his top and shoved it under his pillow. The next night we pinned it to his shirt and the alarm only went off once and that was it. Every night since then he's gotten up on his own to go during the night!