I booked this before knowing that this is a Marriott Bonvoy property, which doesn't really affect me, but they did seem really concerned about statuses and points and exclusive offers, so if that's your thing they are certainly on top of that.
The hotel is new and is in excellent condition. Everything is clean. Wi-fi was excellent. Water pressure was excellent. Housekeeping did a great job, especially in responding to the clean/do not disturb cards we put on the door. Beds were comfortable and there was plenty of storage in the room. The hotel seems geared to American styles and comfort, and they excelled at catering to their clientele.
There is a pool and restaurant onsite, and plenty of sitting areas throughout the lobby. Workers were professional throughout.
The downside is that they located between a busy street and train tracks, so there will be some noise from outside that comes into the room. It wasn't overwhelming, but we did hear the ambulance sirens and cars rushing by, although not enough to keep us up at night.
Keep in mind that this hotel is not in a touristy area, so going to see the sights, shopping, eating lunch or dinner requires travel via a taxi or uber or public transportation.
Overall, the hotel is immaculate and comfortable and I would recommend considering this hotel for your stay in Vienna.