Helena's house is in a quite neighbourhood, we really liked. The apartment is a fully reformed old little house, provided with all the amenities you will need, so we felt like if it was our own house.
From there we walked around to the time out market, barrio alto, chiado, etc. We also took the famous electrico number 28, which stops next to the appartment (5min walk).
Also, we appreciated the welcome with Helena's husband who told us useful information about Lisbon.