C.B.
My son is also 4 and a half. We are doing the alarm thing also. I see one other post that they said they tried it. We are going on three months. My son is a very heavy sleeper, and used to wet through a pull-up every night also. Since we got the alarm he is down to waking up once or twice a week and is dry the rest of the time. Because he is a heavy sleeper, he still can't quite wake up before he goes, but it does seem to be working.