looking for some accommodation ideas in vienna

arms,

You might have a look at Pension Suzanne. It's in the centre of town and within easy walking distance to some of the sights.

http://www.pension-suzanne.at/index.en.php

The two times we stayed in Vienna was at the Pension Nossek, which if I recall correctly was a Rick Steves recommendation. This was about 10 years ago, the location couldn't have been more perfect. The room was small but adequate and reasonable. We did not have a car and most everything was within walking distance or a short train/tram trip. Returned a few years later. Never heard of a night time curfew. If the door happened to be locked you would just use your room key to enter.

We used AirBnB and found a great place right off of Volkstheater - it was the perfect location & price! I would definitely explore other options besides hotels.

We stayed at the Hotel Erzherzog Rainer and loved it. https://www.schick-hotels.com/hotel-erzherzog-rainer/index.html. It's about a 10 minute walk to the Opera, a bit further to other places of interest inside the Ringstrasse. It's about an 8 minute walk to the Karsplatz metro stop (a fairly major stop), and a 3-4 minute walk to the Taubstummengasse stop (which only has one line). We found this hotel to be extremely convenient, very reasonably priced, and frankly it had the best hotel breakfast I've ever had, in Europe, or anywhere. I would highly recommend it.

The only thing I'd point out is that they don't have air conditioning. We went in mid-May and were very comfortable with a fan and the windows open, but if you were there in July or August, it might get really uncomfortable at night.

I liked Pension Wild, another regular recommendation here just outside the Ring, near Museumsquartier U-Bahn station. Only disadvantages are that the cheaper rooms share bathrooms or lavatories, and because of the narrow street the rooms on lower floors get little direct sunlight.

If your budget allows it, the Steigenberger Herrenhof, less than 100m from the Hofburg, more than lives up to the expectations of this upscale chain.

I have stayed at the K&K Maria Theresia and K&K Palais one is by the Hofburg and the other one is near St Stephens and Graben,great hotels with excellent breakfast and service and good size rooms.
Mike