The apartment itself is very nice and it has a great view as advertised.
Lisbon has a knack for 'small businesses' with a corporate mindset, and LU Holidays is the very example of that. The place is nice mid-century decoration from Ikea (the Ikea mentioned in Fight Club), and you are treated 'nicely' but like an object rather than a person.
We had a few incidents - not really LU Holidays' fault, like the garage door breaking down and locking us out. They came right away, but they barely talked to us. They walked away without the issue being fixed, until we figured out it was sort of fixed and we manually opened the door. I left my charger and I was able to get it back, but of course the wrong charger was given to me. Unfortunately during our stay, the building across from us was under construction. We barely slept. So bear in mind sound insulation is not great.
The parking spot is the tightest I've been to in Portugal yet, and I've been to quite a few at this point.
Location-wise, it's in the southern and more isolated side of Alfama, on a hill, so it's not great for walking to the center of town or anything like that.
Def. not recommended for long-term stays, very ill-equipped for that. But overall, it's a nice place if you don't mind all the cons mentioned above. They are responsive and fairly easy to deal with through text.