You set up your schedule and time frames so people chose a slot instead of you having to agree with the other person. It speeds the process to keep your calendar filled. Review collected by and hosted on G2.com.

Time slots are between 15 minutes intervals only. Also, if you don't want to be scheduled you need to pre set it. If someone schedules you are an inconvenient time, you basically have to cancel the meeting and let know that person that they have to reschedule. Review collected by and hosted on G2.com.