Great apartment! I was in Vienna for 2 weeks for work+family vacation, and the apartment was both cheaper and more comfortable than a hotel would have been.
A traveler from the US might find the amenities in the apartment a bit awkward. European appliances and bathrooms tend to be much smaller than what we're used to. But hey, if you want the same luxuries as your own home all the time, then maybe you shouldn't travel. (Personally, I found the bathrooms at Maryna's place to be above average for what I've seen in my own travels in 9 different countries around Europe.)
The location was perfect - only a 1 minute walk to the tram, and easy walking distance to the tourist "ring". Vienna's public transportation is excellent, so you'll never have trouble getting around. Also, there were several good restaurants, bakery, and stores in the neighborhood - just head about 2 blocks east, away from the ring. Note that the stores shut down early on Saturdays (6 pm) and are closed on Sundays. The neighborhood restaurants are open Sundays, and they are better and cheaper than what you'll find in the tourist district, too!