Cannot say enough good things about this houseboat. Its clean, stylish, within walking distance of trams, good restaurants, and the hosts are very accommodating. We wound up only using the trams the last day or two we were there, and walked to other hot spots like the Anne Frank House and Joordan (about 45-60 minute walk including stopping and looking at various cute boutiques). Wifi works great upstairs, doesnt work so well downstairs on account that you're underwater, but we had no issues otherwise.
The ONLY negative that I could potentially see as an issue (it wasnt for us, at all) is how steep and narrow the steps are to get up and downstairs. Since it's a houseboat, space is limited so this could be an issue for someone with impaired mobility.