Highly recommended! There isn't really much that we can add that hasn't already been mentioned, but i think you'll love your stay here if you're physically in good shape and like a challenge - a fantastic apartment and wonderful terrace, with a nice view over the river but the relatively low location of the property at least means that you can avoid the hills whilst out and about unless really necessary, but of course, you'll need to climb a few stairs before you make it home!
The low ceilings will almost certainly mean you'll hit your head a few times but the ceilings are fairly soft (as opposed to hitting your head on brick or stone) so any accidents were soon forgotten about. A great experience dealing with the hosts as well. All in all, when/if i return to Lisbon i'm pretty certain i'll be seeing if this apartment is available again.
Thanks very much Alexandre, we had an amazing time in Lisbon and it was a pleasure to stay at your property!