DS1 has been for the first time today. he's a bright, but not particularly motivated 10yo and I wasn't looking forward to it TBH.
DS1 loved it, told me off for collecting him a few mins early, told me exactly when he's going to fit in his homework (believe it when I see it!) was excited by and proud of the work he'd done and is looking forward to going back.
However, I'd been lead to believe, by friends who've had their DCs tutored, that it would cost c. £20ph - this was £37 
After such a good start it would be a shame to let it go, but that's nearly £2000pa!