This course is a great opportunity if you don't know where to start in amateur radio and can come to Staines in person. I had taken this course and the exam in March 2016 and next month had my Foundation licence. In my group there were students roughly 10 to 50 years old and everybody had passed the exam. If you are not sure you can learn everything in 1.5 days, get the standard Foundation textbook, print the exam syllabus PDF (downloadable from rsgb.org) and spend time beforehand studying that material like I did. Practical assessment for Foundation may feel a bit scary to a newcomer but at ML&S it is very well streamlined, just follow the instructor closely and you will be fine.
Really enjoyed it!
Thanks to Steve for running the course it was great.