Thanks for the answers.
I'm considering two different training providers. The cheap one does all training in an aeroplane while the not so cheap training provider does 35 h in the simulator and the rest in an aeroplane. It actually works out about the same price.
I don't think 15 hours in the aircraft is quite enough
Do you think that it's more likely that I will pass in minimum hours if I do all the training in an aeroplane? I will probably start my IR(A) training with hopefully less than 40 hours of fixed-wing as I already got a CPL(H) (low hours though).