I'd say so. I'm definitely going to sign up for the level 2 and 3 courses when I can afford it.
But I was also a complete novice and had never ridden off road before. So it could be that I was just easily pleased.
Without knowing how tough the level 3 course is I suspect more experienced riders may feel a bit held back by the less experienced guys as are there are times where you have to wait for an obstacle to be clear before your turn to tackle it. Was never waiting long though.
To put it another way, I talked to a couple of blokes who decided off roading wasn't for them, but no one in my group was dissatisfied with the actual service.
"Who needs a car when you're on an Adventure..."