Definitely give it a go,
@Tom.thomas61 .
The format is different depending on which bit of the country you're in.
The one I was on involved me and 5 other T1s, ranging from 1 to 36 yrs dx'd turning up for 5 days and doing a series of lectures and practical exercises re carb counting, run by a dsn and dietician, with some input from a consultant.
I've got to admit I was a bit sceptical about it to begin with, thinking I've been doing this for 30 yrs already, what can you tell me, but I'm pleased to say it did actually help an old dog learn new tricks, and let me polish up a few bad habits I'd acquired over the years.
One of the most useful things was having us all test every few hours (the practical exercises involved us eating on different days at the staff kitchen, the public canteen, and a free range buffet - not much scope for pre-bolusing in those scenarios, but hey-ho), scribbling them down on acetate for an overhead projector, so, at the end of the day, all six of us would review each other's results and pitch in with views on them. Sounds terrifying, I know, but that sort of collegiate approach helped a few people sort out some fundamental issues with ratios which had been seriously out of whack. Which is the main point of the course.
We learned just as much blethering with each other during the break periods.