When guest checkout of your hotel, you should take any comments, compliments, or any suggestions they may have. There is no need to hold them, taking up much of their time, while persuading them to fill customer feedback forms, which they might not fill accurately anyway because they want to save time and head on to the next activity. For example, there is no way a customer will risk missing a flight just to fill your forms. They will try as much as they can to quickly fill the form so that they can get out of your hotel.
Text messages should be your preferred option, since they will get the job done, even more accurately. Customers will take their time to read your text message, and reply to it since they will have much time to themselves when they are not busy. Besides, text messages are easier to store when compared to filled-out forms, which may even require disposal when they pile up to certain levels. Also, asking for customer opinions in a way that is convenient to them assures them that their views are important to you.