The apartment is functional, located close to Santa Apolonia station (metro and train), but I'm thankful Patricia warned us about the steep hill :-)
If you're young and vibrant and have not-too-heavy backpacks only, go for it.
If you have suitcases with heels, I certainly recommend you get some kind of transportation to get there and check in; the hill was fine for us without luggage both going up and down.
We used Uber from the airport, fare was about EUR 7, and then we used it again to get us downhill to Santa Apolonia (EUR 2.50).
The kitchen has everything you need if you want to prepare a quick meal and there's also a nice balcony to chill outside.
Patricia was great with all the info upfront and this place is perfect to explore Lisbon, but watch out if you head uphill because it's a maze of twisting and turning tiny streets, apparently built on purpose way back when by the Arabs, to confuse the enemy invading on foot. Make sure your phone is charged because we had Google maps open and still managed to get lost anyway. It's a real challenge, but worthy.