I cannot speak highly enough of OMBE, and specifically the 12-week Accelerated Surfer Program. There is so much information packed in that anyone who follows the program will find ways to improve.
The 12-week program includes knowledge and science behind the skills and techniques. The focus is to retrain your brain by building skills on land so when you get in the water, you don't have to think and you simply react with proper form and technique. Of course there are plenty of water based drills too. It really feels like you get one-on-one coaching with Clayton and other expert surf coaches. You can upload videos of yourself for critique and improvements. Plus the community of others enrolled in the program is a great place to share tips, struggles, and successes.
Lastly, you can run through the program as many times as you'd like. And each time you will find something new to improve. If you live near waves or not, this will improve your surfing. I've had, and continue to have, so many 'aha!' moments that it keeps me wanting more. I would highly recommend to surfers of all skill levels.