I'm a language teacher and use Bookly to allow students to book time with me online. I have it installed on 4 websites all connected to my one Google calendar and, after some tweaking with the settings, I haven't had any problems. It takes my time zone and schedule into account and detects the student's time zone, and so far has done it all completely accurately.
They recently added the option to set a minimum time frame within which someone can cancel an appointment, which was hugely helpful for my setup. I really appreciate that they listen to their customer's needs and regularly release new versions to implement new features.
