15 hours in a light single for an ATC chap seems to be at the very least misleading for them.
I would suggest that 15 hours in a clapped out old sim with a retired airline captain would serve them better. Real aircraft feel, hold, visuals, speeds etc etc.
If you're going to train someone or give them an insight to someone elses job then it should be done properly or not at all.
However any insight ATC have into our world and ours into theirs has to be encouraged.
Actually I think I just contradicted myself, but there you go!