Siegfried's place is great, good for families specially with kids.
Check in and check is very easy, and you can do it by yourself.
All famous places to visit are within 2-5 km of this place.
Note for families with young children:
We came at Christmas time when all grocery store are closed by 3pm. Then you will struggle a lot to find essential groceries on time. There will be supermarket open at westbahnhof station (1.2km from home, 2 floor underground station) & Bhf. Praterstern 24h a day; and also at few gas stations in the city where you can buy grocerys.
Thank you!