My husband and I are interested in a trip from Boston to London, train to Paris, then fly back to Boston from Paris. We have just started thinking about it, so we have not made any plans yet, but interested in hearing others experiences and any tips you might have for us. We think we would like to go in April or May for about 12 days. We are in our late 40's, have never been to London, my husband has never been to Paris either, we enjoy museums, restaurants, shopping, sightseeing, history. We would appreciate any info re: hotels vs. renting apt on airbnb, what to see/skip, how many days for london/paris, recommendations on what arrondisement would be best to stay, tours ...any and all advice would be greatly appreciated. Thank you fellow travelers!