I would never recommend this product to anyone. Their customer support is appalling, and even worse, the developers themselves seem to be unable to do much about any of these issues. In fact, their technical support team actually told me that they couldn't help me because "the issue was with the database" (they didn't bother telling me which database). If they can't sort out a simple sign-in/sign-out function, how could they possibly be expected to handle something more complicated such as a web application? This isn't a joke - if you are looking for an effective online booking system, please use another vendor.