I left c commando for the best part of 2 weeks to do it. Deffo reccomend this as if they do start and you are by the potty you can just whip em on it quick and yes remind every 30 mins but dont be surprised if they dot go then 5 mins later they have a wee accident. C the 1st cpl days would have 3 accidents in an hour til she learned to hold amounts in her bladder slightly longer