Bad website design.
Stärken
Calendar flaws making it impossible to properly multitask.
I was checking for B&B's in multiple locations as I wanted to travel between certain cities. Every time I wanted to check what options were available it would automatically take the time of the previously selected location even though I specified the right dates... This is not only very annoying but will lead to false availability predictions as the Calendar shows that the specified time are available, after the request is sent for the right dates, you will get a confirmation stating a different date.
I seriously recommend you to fix this in a way that this works with all current (used up to date Mozilla Firefox and Chrome). As this not only annoys but leads to false predictions.