[ly]

The ability to just schedule a meeting with someone from a widget on their website seems to me to offer a complete different user experience than having to email someone and go back and forth over available timeslots, even if that back and forth is somewhat automated.

[wpietri]

Absolutely. For those who haven't used it, I tell Calendly the hours I'm available. It then lets people book any open slot on my calendar. It's so nice to avoid the tedious "how about X or Y" thing.

It also offers more complex setups. So when I was doing interviewing I could set up a single link for a particular kind of interview. It would offer people slots where both of the interviewers were available and then have the interviewee answer specific questions up front (e.g., their preferred programming language to do the interview in).

But I mainly use it for, "Yes, let's talk, just click this link and pick the time slot that suits you."