I stayed there for 24 days in September 2017,It's wonderful, near disco is called"Africa"at achala towards Palmarejo ,friendly place,local language is called crioulo but their official language is portuguese

We are on day 4 of a short break. I can honestly say I cannot understand the negative reviews of this hotel. It is as good as any 3 star I have visited and better than some. Very conveniently situated between Vilamoura Marina and Quarteria.
Hotel very clean and modern. Breakfast good. Staff helpful. Very pleasant break.

I stayed here because the place I usually stay at (Hotel Santiago just around the corner) was full. Santiago is hardly my favourite hotel, having various issues, but it outshines Hotel Sol.

So, the good: Hotel Sol is clean, and has plentiful hot water. The AC works well. That's about it.

The bad: not one of the staff members speaks either English or French (unlike the santiago, where most speak one or both), so comms are difficult if you're not Lusophone.

The rooms, whilst acceptable/functional, are very old and dated, and the bed is small. The toilet (in my room at least) didn't flush properly. There was also a very weird light fitting in my room - a bulb on a wire extending down from the ceiling to about 1 m away from the floor, right in the middle of the room in front of the desk. There is nowhere sensible to put ones suitcase. The lift outside the room made a lot of noise.

The breakfast is miserable, and the breakfast restaurant is equally miserable and drab. No outside space is available.

Finally, and worse of all for me, the internet is basically unusable. Overall, it's ok at a push, but you'll be far better of at the Santiago.