This place was absolutely perfect for my stay in Vienna. Located right near the train station made it easy for me to get off the train with my bags and get to Denys's place. It is close to the amusement park (which is free to wonder around - definitely check it out) and I personally enjoy walking everywhere - and within a 25 min walk was downtown Vienna in the heart of the museums, restaurants, nightlife, etc. Uber is also very inexpensive too - so that's an option if you don't wish to walk.
Overall great stay at Denys's - I know you will be pleased with your stay too!