I've been using TidyCal for about a year now. It's not only a bargain -- I like the I pay the one amount to buy it AND I still get all the updates and news, but it works great. It has all the functionality I need, and is not just a watered-down version of Calendly or any of the others that cost way too much. It integrates well with my Google Calendar, and notifications of both me and any attendees at the meeting happen routinely. HIGHLY RECOMMENDED!