this component have some major UI problems with Yootheme pro
2. color (if I set my timeslots theme to Simple Theme ) my booked timeslot background colors are not respected im getting the color red that I did not select.
3. too many borders please see attached screen shot
4. booking registration form has no padding
5. Timeslot in Simple Theme is not responsive
It seems we have some CSS issues with OS Services Booking on your site, you can submit ticket on category OS Services Booking and provide your site url with super admin account. I'll help you to check and fix those problems.