(Mr M-C posting on her account).
Both M-C and a friend of ours were taught on DAS courses, by different instructors with different firms, NOT TO USE THEIR FRONT BRAKES. To me this is borderline criminally negligent, and was a lazy way of making sure they didnt lock up the front and drop the bike.
Luckily M-C has years of cycling experience, and very well developed road sense and awareness for a novice biker so she has survived to enjoy riding and develop in confidence and skill. A recent temporary lapse in observation showed her just how quickly she can stop a bike using the front brake (when the alternative was to hit my R1 or the stationary car in front of me…) I would treat the DAS as the car test, you are taught to pass a test and then actually learn “on the job” afterwards, and riding with sensible experienced friends will help (though bigbutslimmerblokes mate doesnt sound like hes taken the hints).
So yes do DAS, 4 days should be enough (if youre posting on here you can balance a two wheeler and know about front and rear brakes…) but take it easy when you rip up the L’s.
Costwise if youre prepared to drive away from Reading and S/E youre likely to find it cheaper. M-C did it with brackley yamaha for £450, whereas various oxford companies and http://www.onyerbike.net in aylesbury were 600+.