Cooked the beef for 5 1/2 hours was nice. Tasted far better than when we cook it for 1 1/2 hours on the hob. Will leave if for longer next time though, probably 6 1/2 hours.
Will be trying a pork today and will leave that for 5 1/2 hours. It takes less time on the hob so think 5 1/2 should be about right.
A very good investment I think.