Anyone have any experience with JM Walking Tours in Venice? Per TA they have great reviews. They are a "free" tour service that you can make a donation to towards their charity. I was looking for something to fill up my afternoon after arrival on our day of arrival withouth any huge expectations. They starting point is only a block or two from our Hotel so that would be convenient. Might be a good way to get some sort of bearings and hopefully learn something. The other part is how much do you pay a free tour? I guess that depends on how good it is.
Anyway if you have any experience with them and are willing to share, I am willing to listen.
Thanks