I think that this is the only reason that takes people to Portela - to see the views. It's the only one, but a strong reason, because the views or the north coast are tremendous.
If you visit the east side of the island you must plan this point as a mandatory stop.
WE didn't eat there but this restaurant is the only commercial place near the sightseeing point, which means selling drinks and snacks all day.
Toilets... of course...