Stayed for 10 nights and loved everything about the apartment. We were close to everything, and didn't use the city's metro once. Staff was great and very helpful when we needed it. Keyless system was also super convenient. While technically there is no official reception desk, there was a staff member there almost all the time (and including overnight) so we felt really safe and that the building was secure.
Nice to know: For anyone tall, the shower is nice and high (my 6'2" husband had lots of room to spare), and for the girlie's with long hair the water pressure was great.
As others have mentioned, the storage in the bathroom is lacking, but having read them, I brought a small stand up travel mirror and made the dinning table my "get ready" area and it worked out great.
Storage for clothes was excellent. At least 10-12 hangers (with pant clips) and lots of shelves so we were able to fully unpack and settle in. Being there for 10 days, we also made use of the laundromat that was just a block or so away which made packing for that long so much easier. The cleaning kit you get on check in though did provide a tide pod so you could do a small load by hand in the sink if you needed to. There was also a great market just down the road so we were able to pick up the essentials we needed (tea, milk, beer, wine, snacks etc.).
Overall we'd highly recommend the Libere and would book again without hesitation if we are ever lucky enough to get back to Portugal.