We spent 4 days there with our 3 kids and really had a great time. Michal and Marketa were super responsive and helped us with everything during check-in. The electric boat is priceless as it provides a relaxed transfer to the city before and after the tourist-crowd madness. We also went by bike but would heavily recommend suspension bikes for longer tours on the cobblestone streets. If you want to go to the Andel / Novi Smichow shopping mall by car carefully follow the suggested route, otherwise you easily get lost in a labyrinth of one-way streets. If you got kids, go to the Metronome, watch the skaters, get yourself a beer in the beer garden and enjoy the view over the city. All in all: great place, great hosts and really relaxing for a city trip with kids. The people density on the Vltava is so much lower than on dry land ;)