Great studio apartment with an amazing view! The place is decorated in all ikea giving it a modern euro feel, but this place is all about the balcony and view. All of the time we were not out exploring was spent either on the balcony sipping a refreshing vinho branco or sleeping.
The apartment is very conveniently located right in the bustling Bairro Alto/Chiado which makes everything a short walk away. If you're wanting to take public transport there is a metro stop, major bus lines (714, 728, 760, 15E), and the famous tram 28 all within a 5 min walk. The flip side of being so conveniently located is that the noise from the clubs along Rua de Sao Paolo can be heard in the apartment on the weekends even with the balcony doors shut. However, this also means that it's a short walk home from them :-)
I never met Alex, but he was always readily available through the Airbnb app and promptly answered any questions we had. Get yourself a local SIM card with 500 MB or 1 GB (11€ or 15€ respectively) at the vodafone store on Praca Dom Pedro near the Rossio Metro stop and you can stay connected during your visit.
We did have a few minor issues during our stay that warrant mentioning. First of all was the tardiness of Alex's representative at both check-in and check-out. At check-in it was only 10 minutes, however, we had to wait another 15 while she cleaned the apartment (also a bit disconcerting that she cleaned in only 15 minutes). This left a sour taste from the start, but we quickly got over it when we saw how great the place was. At check-out it was over 15 minutes but I don't know by how much because we needed to leave to catch our flight home.
As a privacy-minded individual I feel there is one last thing that deserves mentioning: they request that you fill out a form with a good amount of personal information. The point of using Airbnb and not craigslist or some other site is that you don't have to give your personal information out to a stranger.
Other than these relatively minor issues, we had a wonderful stay and would stay again in a heartbeat.