It's the most recent guidebook available for the city and is jam-packed with ideas for eating, shopping and sightseeing with top-notch photographs throughout.
There is plenty of historical context and interesting trivia too, without being too dry and overly academic (Secret Lisbon, anyone? Anyone??).
I do wish Time Out would be a bit more opinionated, like the Cadogan guides, sometimes the descriptions do oversell a couple of places (the Se and Castelo were particularly disappointing - and extremely overpriced, in the case of the castle).
The couple of errors mentioned in another review are extremely minor and the gripe about opening hours can be said about EVERY guidebook: circumstances change, places shut or move, it's something all travellers have to deal with. For instance, you can add a couple of euros to all the admission prices quoted!
BEST OF LISBON
Sunset from Esplanada de Igreja da Graca
Riding the old trams and funiculars at night, when they are lit up inside and less crowded
Gulbenkian Museum and surrounding gardens
A day out to Sintra
Oceanario Aquarium - expensive but well worth it
SURPRISINGLY INTERESTING
National Pantheon - lovely buildng, great rooftop views, interesting insight into Portugal's heroes too
Centro Cultural de Belem - free modern art collection, fascinating temporary exhibition on at the time
The whole Park of Nations development - shame Belem isn't as nice