Seems like I'm not the only one who's tried this alarm and found that it doesn't wake from sleep as claimed. Maybe it's 10.4.11 that's doing it but it seems not, from the number of posters below and on the dev's forums. Strange that users should hae such divergent experiences (in both service and performance) from a single app. Still, reliability is the key with alarms and this one gets nought on that count. One star for the eye candy and decent UI. Will look elsewhere for functionality though.