Apartment is basic but great. Has what you need for a nice short stay. Beds were comfortable 100% esp. as we walked all day and would ache from it. A good nights sleep was 100% needed.
We had a kettle - good to make teas. Dishwasher was useful.
Everything worked - we had no problem using anything within the apartment.
The location is PREFECT! Walking distance from memorial of murdered Jews (literally around the corner), Brandebourg gate (also around the corner) and embassy row. Riechstag building, parks, restaurants, coffee places all 10-25 mins walk. If you get inclusive travel - all your main lines for public transport are walking distance and are useful. It’s super well connected.
I don’t have any negatives if I’m honest. We came for 4 days and truly enjoyed our stay.