questions can vary from residential apartment renting to tourisitc apartment renting seeing as different preferences and request may be wanted from the potential lodger - budget and comfort can vary for each customer, so it is always best to explore all the options targeted towards one main purpose of leasing, whether it is for living or for traveling.

generally speaking, one should always ask for a rental agreement seeing as it will define precisely what can and cannot be done in the apartment, who has access to it, noise regulations, any further restrictions or requirements, and cancellation policies.   

we strongly recommend conducting all negotiations in writing via email, rather than over the phone, to be able to track and recall all details of the rental - if able to visit the flat, it is reccommneded seeing as it can serve as a confirmation if what is said is true.