To give perspective, I am an experienced traveler from the USA who has been using VRBO the last few years. I stayed 10 days in Mani's apartment in December. I think I was the first person in there after it was remodeled and furnished.
The photos and Mani's description are accurate. It really is 2.5 Min. from the U-4 line and minutes from everything in the historic city center. If you intend to spend most of your time there, you can't do better than this property for location. I felt safe walking around the area even late at night (just remember you are in a big cosmopolitan city). Note that Wien Mitte is also called "Landstrasse" on the CAT train info. lest you get confused. For 2012 the CAT train station is undergoing a complete reconstruction so the transfer to the U-4 is kind of an adventure.
The property is in a 100 year old block characteristic of the whole district. It has a lift that drops you at the front door of the apartment. The apartment faces the inner courtyard and has 2-ft. thick brick walls. This was the quietest place I have every stayed. I only encountered two people in the building in 10 days, although several permanent residences are there. In the winter the water heater must run to circulate water through the radiators, but you get used to it.
The furnishings are modern minimalist, couch and bed very comfortable (for the Americans its not your Certa posturpedic). The kitchen is functional, well stocked and the bathroom has a new shower in it.
Something to do is turn left upon exiting the door of the building, Turn right at the corner and in a block you will encounter a floor-to-ceiling "Altesware" (antique) store. Even if your'e not into that, do it anyway, keep walking to the Zielpunct, restaurants etc.
Mani was very responsive and friendly and easy to work with. He always answers his phone, so you have an excellent connection as needed.
If you are into immersion but want the quiet place to rest, this is ideal.
I highly recommend this apartment and Mani's service along with it.