Absolutely recommendable!
We stayed in Daniel's apartment for about a week and had a really great time. Located in the Alfama-neighborhood, you can easily walk to some of the citys most famous sights. The apartment itself is clean and equipped with everything you might need for your stay. Although we (unfortunately) never met Daniel, check-in, check-out and everything in between worked just fine. Daniel gave us some great insider-tipps for Lisbon and we could contact him anytime to ask for bis advice of get answers to questions.
Thanks for the great stay, your apartment really is mal first choice should I come back to Lisbon. :)