I like that it is very easy, quick & simple! You literally just login once you have downloaded your client profile from MyNudges App (or website), add them as contacts then send out nudging messages at intervals of 30 minutes or 1 hour depending upon what time zone they are located within - this can be changed if required but defaults usually work well enough until changes need made later down the track when more accurate information has been captured/recorded via surveys etc..
It's also nice having all the stats recorded so easily accessible through an overview page which shows where each contact sits along various scales such as weight loss, dieting success rates etc., plus allows multiple people per account too without confusion over who sent whom. The only downside would perhaps being able to change font size / style slightly larger than default could make things easier reading some large texts eg names. This helps keep us.