Personally I found the Bell 47 the better of the two helicopters to train on. Much more forgiving for both student and instructor than a R22. Old technology for sure but has proved incrediably reliable and mature given the basic technology is over 50 years old!!
The old real draw back to a B47 is that it is a slow cruiser. Plenty of time to watch the view go by.
AS to new machines I cannot comment. My old school has introduced H269/300s for training but cannot comment.
Regards
Whissper