Love to hear from someone who has taken a barge trip

I am considering one of the RS barge programs in France this year. I would love to hear from someone who has barged in France (or elsewhere). I am almost ready to take the plunge and pay my deposit. The one issue for me is the significant single supplement on these programs (almost 40%), so I want to hear about the plusses and minuses of the experience. Would it be worth it at 40% more of the cost?

Would also be glad to hear from anyone else pondering a barge program.