I don´t have much time to write the story here, I have used booking.com as a guest and also as a property owner, so I can compare both sides. While mostly there is no problem on the owner´s side, there is always terrible customer service on Booking.com side. And recently they just change what they call "a privacy". This means you will no longer see the contact e-mail to the guest. You have to call them and they have to call you, which I found disrupting. I am a business man and have no time to giving the personal info (date of birth, address, passport number etc.) over the phone and certainly I am not willing to send it to booking.com mailbox. Also the review system they use is a complete crap! You stay in an apartment and you suppose to answer questions related to hotel. If you do not answer, the system counts it as you gave zero points and dramatically lowers the final score to the property. So you either have to lie or your review will look like you were unhappy there, regardless you wanted to give 10 points... And on top of this, 15-20%% commission is what this site charges the owner! Even on breakfasts... Awful. That is the reason why some property owners have to add some extra fees, to get this large chunk of commission back... Anyhow, Booking.com is not a company I would trust.