I just came back from our first encounter with donkey bikes. My girlfriend and I rented two bikes in Budapest for 8 hours and it was absolutely great. The registration process is and also the app in general are very easy to use and quick. The bikes were in good conditions and worked perfectly. The pricing is fair too. Im pretty critical when it comes to services like that, but Donkey Republic I can really recommend 👌🏼 Have a nice day out there!