The user interface of this program makes it very easy to use both in terms of creating events as well as managing clients/registrants that are attending those specific dates or times. This allows me total control over all aspects related to my business operations - from scheduling through payment processing & reconciliation. There's nothing I dislike about our experience using sinteSYS! We have been able run multiple programs at once without any problems whatsoever with regards booking time slots and tracking registrant attendance throughout the day (or even weeks!). It has allowed us complete peace-of mind knowing we can focus more attention towards building strong relationships within each client base rather than focusing so much energy into just one project alone which would require constant monitoring by myself if done otherwise. With its powerful features comes an equally heavy price tag but when compared against how many hours spent working manually versus what you get out.