Despite the nice sized rooms and cleanliness, decent fitness room, this hotel is too far from the town center and too Americanized. This was the worst breakfast on my Europe trip. Lisbon is a beautiful city, in retrospect I would stay elsewere.

Stayed for business conference. Room comfy, good bed and pillows. Bathroom basic but fine.only ate lunches and breakfasts there, again no complaints, lots of choice - unless you are vegetarian.
Highlight -really lovely staff.
Drinks more pricey than the bars (4.50 for a glass of wine) So no different from English hotels really.
Yes, out of the way from city centre, but taxis are really cheap.

Due to business and leisure I travel a lot to Lisbon and tried most of the hotels. There is no more comfy bed than in Marriott and breakfast is the best I had in any portuguese hotel.
Although the decoration and bathrooms are not that modern you just can´t fall in love with the pillows and the bed.
Basicly I consider this hotel my home in Lisbon and really enjoy the price (enterpise discount = 70 € per night!)
Severall times me or some of my firend left some belongings at the hotel and they were alwaus found and sent by post to us.

I stayed with the hotel for a very short duration, but I regretted the idea of booking my stay with Lisbon Marriott within the first 5 mins of my check-in. The rooms seemed small and of very old construction. The hotel would charge you some 19 Euro for 24 hr internet, but you can only use the internet using the cable. WIFI is not available in the room.
No tea-coffee maker in the room.......
so incase you plan to spend a long time, i suggest try other hotel, besides the hotel is located much far from the city centre, with minimum means of transport other than taxi, incase u wish to travel around