We (couple) chose this hotel because Baedeker describes it nicely, because of the 5 stars, because there were many good reviews.
Our conclusion after three nights: far below the 5-star level.
(1) Our room had a permanent problem with a stinky sewer smell from the bathroom: it stank so badly that we had to sleep with the window open (i.e. noise).
Other former guests (Giles 2023/03, Marc 2022/11, Phil 2022/11, Nigel 2022/11, Dominique 2022/11, Nick 2023/11, Robyn 2023/01, etc., etc.) reported similar experiences.
We reported the stench after the 2nd night and the solution suggested by the front desk manager no longer made sense.
(2) Room amenities, bedding, hotel general condition, breakfast were at a good mid-range level but nothing more; everything was very clean.
(3) The staff was moving around a lot, but didn't know exactly what to do.
Fortunately, the next leg of our Portugal trip is a real 5 star hotel and we can enjoy this beautiful country.