My friend and I stayed in Laia's flat (a third friend had to cancel last minute) and it was the perfect space for our needs. A fourth guest might have been a bit cramped as the living room sofa bed is small. Check-in was very smooth with key codes being provided for entry to the building and flat, adding flexibility to arrival time. We actually never saw Laia but she responded to any messages or queries promptly. A few cooking essentials are available - olive oil, salt - and although there is no oven, there is a kettle, microwave and hob, so was suitable for our basic needs of making breakfast and simple lunches. There was ample wardrobe space and TV is easy to use and equipped with Netflix. The biggest draw for us was the terrace, which enjoys late afternoon sun and was ideal for a bit of sunbathing and pre-dinner drinks. We did rely on air conditioning one night and unit functions well.
The neighbourhood is quiet and there are shutters in the bedroom to make it extra dark. Unfortunately a couple of our nights were more noisy owing to the neighbours next door arriving late and taking showers at 2-3am. There appears to be a shared storage space accessed via the living room with an unsealed wall, which lets in noise and light from the adjacent apartment. Less of an issue if you are staying in the bedroom and not on the sofa bed!
Final thing to say is that we loved LOVED the neighbourhood. Gracia was so beautiful with its small town feel and we were lucky to enjoy so many of its little tapas bars and boutiques. The flat was also an ideal distance for walking to Parc Guell (15 min) and La Sagrada Famiglia (20 min). The metro was easily accessible but we always liked to return to Gracia to spend the evening and relax after a busy day! Thank you Laia for your wonderful hospitality.