CATII & III approaches, when everything is working, are not difficult and only require a high level of monitoring, however, failures during the take-off roll, using the black and white Barber's Pole, can be interesting, as can the go around from a very low height. Not all companies are the same but, in my last employer, to maintain currency, there would be one no problems approach and landing and all the others would have failures of one sort or another fed in.