Pros: Location is great if you want to spend time in the very heart of Barcelona. The view from the window to Ramblas is beautiful!
Cons: The apartment is not suitable for a long stay, especially in winter. We stayed in it from November till January and it was very cold. Air conditioner and heater helped a little, but not much. It's not allowed by the house rules to keep conditioner and heater on for more than 8 hours. As soon as they're turned off the apartment cools very quickly. We asked for an extra blanket, which helped us a bit. There is no heater in the bathroom, so it's the coldest place in the apartment. Hot water was hardly enough to take quick 5 min long shower. It takes several hours to warm up a water after that, so the second guest has to wait. We had to leave 10 days earlier as we've got sick because of cold.
There is only one set of bed linen and it takes several days to dry closes/linen due to very high humidity in the apartment. Hairdryer was listed, but there was only curling iron instead. We had to explicitly ask for it.
The place is described as "Laptop friendly" in the listing. This is not the case at all. Uncomfortable sofa and hard wooden chairs are hard to sit on.
The bed is uncomfortable, the pillows are old and smell bad. Aromatic wooden sticks were put into the pillowcases to neutralise the smell, but it didn't help much.
The sofa was broken in the living room when we arrived. Replacing it with a new one took 3 weeks and we had to wait for delivery. New sofa was not comfortable either and I had to pay workers to assemble it. It took some time to have my money back and I had to ask for it several times. The old mattress was left in the living room until our checkout.
I wouldn't recommend this apartment to anyone, especially in the winter time.