The webpage is not at all updated and shows online the discounted price, which we only get to know before boarding: the fare is 4 euros for 24h or 6 euro for a return ticket.
Departure times are never respected, I waited yesterday 55min, instead of the less than 20min promised!
If taking line 2, bear some extra time for the Entrerios coach station, it takes a while there.
Also, there aren't visual announcements of the stops, passengers have to guess, count or ask - the video on board is always off.
Wifi on board is available but one must ask teh driver for the password: YELLOWBUS.
Being taxis so cheap in Lisbon, I dount I'd take them again, too unreliable despite the very kind staff!