Not a great fit for his use case, given that it doesn't do Outlook integration. It is also built for reminding lots of clients rather than yourself, repeatedly

Not a great fit for his use case, given that it doesn't do Outlook integration. It is also built for reminding lots of clients rather than yourself, repeatedly, in a way which would meaningfully compromise his utility. (For example, I rather suspect he'd get reminders not delivered after hitting the rate limit for calling himself. The rate limit exists to prevent clients from imposing overmuch on customers of theirs.)