Overall our stay was good. The location is more suitable for tourists who want to view the central Lisbon, but there are not a lot of grocery stores, and they are small.
Even though there is a washing machine in apartment, it might be tough to dry your clothes due to limited space. Fortunately, there is a public laundry nearby, where you can dry your clothes for 1.5€.
Also, the ceiling is quite low, so it might be a problem for guests with bigger height :)