I absolutely love ScheduleOnce. I include a link to my scheduling page in my emails and all marketing materials so if potential clients want to meet with me, all they have to do is go to the link.
I've been doing this for about 3 weeks now and in the last week alone, I have been scheduled for at least 8 appointments with potential clients and partners. It enables me to implement a very structured and organized approach to meeting with potential clients and partners. And it easily integrates into my Google Calendar!
I would recommend it to any business owner that needs an appointment scheduling system.