Researched TripAdvisor for clean, well located, 5 star hotel in Vienna. The Ring is the place. Rooms were new and clean which is my fundamental first priority, everything worked (including Nespresso machine which greeted me every morning), staff was friendly (and attractive). Wired internet in room was fast, dependable, and included in price. The Ring is located on upscale street close to other 5 star hotels. Lots of good neighborhood restaurants close by, parks and sights within short walk, and a main metro station is located across the street (I never used it - walked everywhere). The food was just OK - a little expensive but not more than expected for hotel food. I only had a couple of room service meals in the room - nothing special. The restaurant never seemed very popular with other guests or residents. Plenty of less expensive, more rewarding breakfast alternatives near by.
I live and work internationally and travel frequently, primarily for pleasure. I typically select 4+ to 5 star hotels that are clean, centrally located, and have positive Tripadvisor reviews. These hotels typically aren't the cheapest, but they provide the most value according to my preferences. The Ring fits in this category, and I will stay here again when I return to Vienna.