This was our third tour as a couple, and my fourth. My favorite was Croatia bike/boat in 2006, followed by Danube - Passau to Vienna, and Saar/Mosel (tossup). This tour was excellent too, but many of the paths/roads weren't along the lakes. The first day from Konstanz to Stein am Rhine and the second back towards Konstanz again was a little hilly, and we had to wait out a thunderstorm with small hail at the border crossing into Stein am Rhine. All the hotels were excellent. Remember to use the boat voucher crossing to Ueberlingen. I didn't, costing me extra. Some interesting birds and wildlife will be seen in the Rhine Delta on the third day, and we often heard cookoos. After we picked up bikes, we were suggested by the tourist office to see Mainau Island after 5pm when admission is half-price. Meersburg Castle is well-worth seeing. The Zeppelin Museum in Friedrichshafen was someone interesting, but only for transport fans like me. We enjoyed the tour very much.