My friend did the check-in with Lala because she arrived earlier in the day (I arrived in the evening), but everything went fine. Lala stayed in contact during the trip and was always reachable.
The apartment is well located, within walking distance of Rossio and other sites. It's very clean and easily has enough space for 4 people. I highly recommend it.
Only small issues was we he had ants in the kitchen (they arrived from above the stove), but a few sprays of the bug spray and they never came back.