I learnt on a C-42, owned a share in an ex flying school C-42 that had done over 3000 hours of successful training and now teach on a C-42. They are an excellent all rounder and because of that never going to be that exciting or exotic.
They are perfectly strong enough for training. They may not be able to take the levels of abuse that a C150 can but it is easy enough to get students to treat them with a little bit care right from the beginning which I think is a good thing, whatever they go on to fly afterwards.