We had a very pleasant stay at this apartment, nicely located in Bairro Alto. Lots of space for everyone, the kids loved running around and the many rooms/beds, 3 bathrooms, kitchen and large living were very convenient for a big group. The decor is simple but cozy and modern and it was properly equipped. The attention was amazing, Miguel welcomed us, gave us plenty of recommendations and was always available for any query. Central Hill has very good email communication and planning before the stay and offered many organized services (transport, tours, concierge, etc.).
The only minor things to note about this specific property, is that it was located on the 3rd floor (equivalent to a 4th as their was an upper ground level), with no elevator, so it was a sports challenge to walk the stairs with a lot of luggage and baby strolls. Also, the old town apartments are very charming but are not very effective isolating noise between rooms or from outside... but nothing extreme.
In summary, I highly recommend Central Hill and would definitely consider them for my next trip to beautiful Lisbon.