Just checked the Amazon item - it sounds good, and according to them it's made by trappist monks in the Sept-Fons Abbey in the heart of Auvergne in France.
The one Customer review there states "I generally don't like bananas much on their own, but this jam is absolutely sublime. The blend of flavours and the texture is perfect. It is a great gift for banana-lovers and is worth trying if you are not over-keen on bananas, but love to try new and different flavours"
I think I'll give it a try :-p