Shelley is a very kind, helpful and talkative host - a real people's person. Had some great recommendations for us as well. The pets definitely take after her but won't bother you. Apartment is right in the middle of Stephansplatz - so you're really in the centre of the old city; most things are within walking distance. Place is also very tidy, comfortable and cozy.
Overall definitely a place worth to stay. Will try to book again when in Vienna.