We had a decent stay at the Sheraton. It is overhyped for what it is and overpriced. Our room was decent, bed was very large and comfortable, clean and crisp sheets. The negatives were that the rooms have absolutely zero views, unless you have a pool view room. The bathroom is tiny!! Also, the bathroom seemed really cheap and basic, though it was clean. The walls are super thin and the double glazing very poor, we could hear other rooms toilets flushing and we were woken every morning at 5am by the bins being collected and lots of metal bins being banged about, then around 8am the maid's trolleys would wake us up as they were dragged back and forth on the jagged tiles outside, not to mention doors being banged everywhere.
Reception staff were not the most friendly.
Parking in the hotel was super expensive, €8 per day, this is not made clear at time of booking. My advice is to park on the road anywhere outside the hotel, free parking and no restrictions.
Breakfast was fantastic, huge variety, plentiful, great covid measures being practiced.
The swimming pool was nice, but not enpugh sun loungers and we were never able to get a sun lounger.
The location of the hotel is fantastic as it's just a 12 min walk to the beach and the restaurants. Vegetarians beware, there are very few options available, but a heaven for seafood lovers.
All in all, I definitely wouldn't stay at the Sheraton when I visit Sesimbra again.