If you want to stay in the fun part of town, this is it. Tiny little flat in Bairro Alto on a typical, very hilly street full of old Portuguese buildings.
Biarro Alto is full of bars and restaurants, so it's very busy, and it noisy throughout the day and night. Be prepared for this - take some earplugs.
The flat was tiny but very clean and had everything we needed. The larger of the two bedrooms has no windows which made it quite hot even in Autumn, but a fan was provided - I think in the summer it could be too hot, but we found it fine in October.
Communication from our host was excellent - super easy to speak with and very helpful. Check in and checkout was very easy and he was on hand to answer any questions we had throughout our stay.
If you're looking for a centrally located flat and are in no need of bells and whistles, this is a great option.