Not happy with this service at all. I paid for the service on Friday morning after failing my best the week before, and did not hear anything. I logged on the DVLA myself to check tests on Friday night and found a test for NEXT WEEK! I would not recommend this service, and I'm going to try and get my money back. I know you may not have time to check, but ask a family member who works in an office etc, and even your driving instructor - they usually know when people are going to cancel. The best time to check for cancelled appointments I've found is between 9-10pm. Good luck.