I'm delighted that those of you going are doing this. I've done 3 of them, plus activity days. I guarantee you'll drive home slower than you drive there
You will learn loads! As mentioned, if you have a heavy car (more than an Elise) pump your tyres up if you like your alloys and sidewalls.
As ever when learning new stuff, open ears and mind, try to do exactly as asked even if it's counter intuitive at first.... Which it may well be!
You'll surprise yourself as to how capable your car is in trained pair of hands, and very possibly realise how close you've been to binning your pride and joy all these years.
IMHO, the day is excellent value for money and could be worth a huge amount to you at some point in the future. Enjoy!!