Gabriel’s apartment is modern, clean, and well stocked with cookware and other utilities such as a fridge, oven, microwave, and (importantly) a washer/dryer combo.
It’s located outside of the city center, but I never felt unsafe and it’s proximity to the Praterstern and Nestroyplats train stations make it extremely easy to get to the main sights. Gabriel was very responsive and accommodating, giving many recommendations on local restaurants to try and sights to see.
Overall, I spent a week in Vienna for a conference and I had a wonderful time due in large part to my accommodations and Gabriel’s hospitality. My one complaint is that the bed is extremely firm, which may be good for some people, but it was a bit much for me.