I enjoyed using Meeto-o-matic but I think if you can access Doodle it is better as you can be more specific about meeting times. I have used Meet-o-matic to arrange a meeting with Librarians from different Libraries. I have used Doodle to select the best day when arranging a day out with family, and a friend arranged a rota of people to take her Mum to hospital appts by sending family members a Doodle so they could confirm their availability.
caterpillarlizzie 