One of the worst experiences while using Airbnb. First of all, we book the flat via AirBnB, seems okay and legit. Then they start asking for a lot of validation details, but you have to use their system which is completely not related to the Airbnb platform. Looks shady and inconvenient already. Once I get charged they inform me that they will want to reserve 400 Euros on my credit card, but only using their system. I finish all of the work that needs to be done to get access to the flat and I am waiting for my trip. Once I arrive in Paris and I am ready to enter the flat I cannot access the digital key. The reason is that they want the 400 Euros that I already booked a week ago. I try to add my card details again in Paris while it's crazy hot... I try one card - rejected, since their system does not work. I try my second card - rejected since their system doesn't work... Okay... I try my third card (surprise, surprise...) doesn't work for the same reason. I call them and inform them about the issue, they tell me that it's my problem and I should call my bank, of course, inform them that it's impossible that 3 different banks (Swiss banks) would be the ones responsible for the issue. The lady on the support line informs me that she'll try to speak with her team and see what can be done. Never got back to me. By this time I am already waiting with my 2 other colleagues for a good hour to enter this bloody flat... I decided to call my banks and discuss it with them (maybe it is actually a problem on my end). All of them inform me that everything seems to be working well from my side as the cards are being used all the time in various around the world. By digging deeper they see that the payment is not processed completely on the side of Sweet Inn. I text the Sweet Inn team and inform them that I did everything from my side to make it work and it still doesn't work. Their team just tells me that it is my problem and not theirs. End of story... This continues for 2-3 hours always hearing that this is my problem. It was my first and last time using their services and apparently meeting one of their employees we figure out that this is the same issue all the time.