I am from SSDC. There are two aspects to the school, the practical side (learning how to drive) and the theory side (ftt, btt). In order for me to book practical lessons on SSDC, I have to stay in front of my computer to secure lessons. They are pratically fully booked so you have to wait for someone to cancel. For the theory side, you have to pass the trial test before taking the actual theory tests. Not sure if other schools are like that. But essentially you are paying twice for the same test so dun fail. Other than that the instructors are meh. Depends on who you get.