I'm the alumni from ATS, graduated since 2006 who do believe ATS which is one of the schools, providing practical and technical knowledge in construction and engineering industry for the students. Students are educated from F.1 to F.6 with engineering knowledge, offered a very strong sense for entering in eng / const. industry.
I failed in HKAL exam but I've completed my Master Degree in HKU eventually this year.
For the bad comments as below, I would say " If you want your son to be success, it is not related what school you are studying. The critical point is how you teach your son to be initiative, positive and passion."