At first this plugin seemed very promising. But it was in conflict with Woocommerce and not working correctly. So I created a subdomain with its own wordpress installation to avoid plugin conflicts.
After setting up everything again (took me a while) I noticed a new issue with the employee notifications. When I save my custom message, reload my page, the message section is blank.Very strange indeed. To work around it, I type the custom message in my PHP database and then I can save it there. Good work around but It should not behave like this. Then I found out the working hours did not save either. Luckily this got fixed pretty quickly but then I found again, another issue. The appointment times are not correct. I've set this with 15 mins increments (so it should look like (08:00, 08:15, 08:30 etc.). But it does not... I can only choose 08:00 or 08:30 and then it goes to 11:00. Also my PHP error log is full of Bookmify Cronjob errors. In short, this plugin seems to have allot of bugs.
The biggest complaint however is the support. Yes, you do get an awnser... eventually. But it goes around in circles and costs allot of time. After two months of going back and forth the last straw was last week... "please delete Bookmify and reinstall".... I did ofcourse... knowing this would not help. I have one month of support left now... and a plugin that has not worked properly from the beginning.
I have no idea if other people have these issues too but for now I can't recommend it. Really sad though because it did look very promising:(.