The company told us that check in was 15:00 (3pm) and when we arrived at 15:10 the guy they hired to clean the place was still there and wasn't finished. He said we could come in while he finished and he seemingly rushed to finish up. The microwave was still dirty. Some of the kitchenware was still dirty.
Welcomergroup owns all the apartments near by in the building and throughout our stay there was constant construction and commotion outside the doors. The activity usually started around 8:30 in the morning. If you sleep on the pullout couch in the living room you will be awoken by this. If you sleep in the bedroom, according to my friends, you can't hear the construction. Although as of this review I don't think they have much longer to go until they finish up.
That being said, the apartment is in a great neighborhood. It is a very short walk to the Palos de Fronterra metro station which get you on the very centralized line 3 (yellow line). There is a Lidl right around the corner for your grocery needs.
It is a very modern apartment that is really nice. The furniture is quite nice and when the weather in nice outside having the large windows open is great. It does have two small balconies (the bedroom and the living room) that you can stand on to enjoy the weather.
Welcomergroup is very responsive to issues that need to be resolved.