I highly recommend this Sixt office. The staff was super friendly, they took the time to explain everything, no hidden fees or anything weird. Also the car was in very good conditions.
I spent quite an amount of time reading through all the reviews from other companies before making my decision, and by far, Sixt has the best feedback in the market. I'd recommend it to anyone who wants to spend a little more to have a guaranteed optimal experience.
And again, the staff made everything much easer. From the front desk (thanks Bruna!) to the guy who deliver and received the car (I forgot the name, but thanks!)