Mirko's is an amazing host. He is nothing short of spectacular.
His place is in prime location; everything walkable, nothing longer than 30 minutes tops to most major attractions. We never had to take a taxi from Mirko's place, unless it was to the train station, even then, it was 15 ish minutes. I would highly recommend staying with Mirko if you're looking to site see, great restaurants, or if you're just new to city.