Beware: if you adjust your Airbnb reservation during your stay, Airbnb will apply the current (i.e. the most expensive) price retroactively to the beginning of your stay. For example, let’s say you make a reservation for $100/night for four weeks. After the second week, you need to leave early and you and the host agree to do this. But the pricing model (if it’s dynamic pricing – which is chosen by the host) shows the rate to now be $150/night. Airbnb will charge you $150/night for your entire stay. I recently had this experience and was overcharged $400 – and Airbnb does not give a damn about it. On top of this, Airbnb will charge you for an extra 30 days because of their long-term cancellation policy – which Airbnb will waive if you and the host insist on it. Airbnb also removed my negative review of the host, stating it violated their policy – even though I spoke honestly about the nightmare I experienced.