If you want a bells and whistles calendar, then "this is not the calendar you are looking for, young Jedi". But if you want a simple yet effective calendar then this is it. If you've never had an online calendar then, for the price, this is a pretty nice product. I can't fault it. it does a great job for what I needed which was a simple calendar that I could add a link to in an email. You can actually offer a few booking variants, such as '5 minute call', '10 minute online demo' or '30 minute appointment' and link to all of them in an email or even insert a link to one depending on who you are emailing.
I like that.