I stayed in this above average hotel in August last year 2010. I would say that in Vienna you won't find such a value for money accommodation. It's nice place to have a good nap after a very busy day and my advice is to avoid all the street view rooms and it might be very noisy at time especially that windows are not double glazed. More positive thing is that within few minutes you will be in Vienna center using one of these regular nice shuttles free of charge :-)
BTW plenty of cheap internet cafes are around and the hotel it self provide free wifi and internet.

This hotel was a bit far from the centre but ideal if you travel by car. The underground parking was safe and cheap.
Very quiet place to sleep if you get a room facing the inside court. The breakfast was superb! You can choose from a large variety of dishes and refill with the best bits.
The staff was friendly and helpful. They give you patient advice on public transport and sights to visit, in decent English. All together a lovely place to stay. Highly recommended!

Just a short staying (2 days) at this hotel in Wien. The hotel is located near a tramway stop, not far away from the city center (10-15 minutes). The room was very large, clean and quite. There was free internet access in the room. The breakfast was rich and tasty. It was easy to find a parking place for free in the surroundings. All in all a good accommodation and worth the money.

I needed to stay over a hotel that would be close to the airport but also close enough to the city center, and Hotel Gabriel combines those two things. Quite clean, spacious rooms, polite staff. Very good breakfast, all freshly cooked! It is definitely a budget hotel while offering very good accommodation especially for business travelers!