Staying at Casilda’s flat fully met our expectations. The owners were very flexible and patient at the time of our late arrival because of the lost luggage. Also they were able to accommodate our small requests before our arrival.
The flat itself is very clean and very close to the sea, literally 5 minutes of quick walking to Bogatell beach. It’s not nudist area (in the description it’s said that the flat is close to Marbella beach that is known for nudists), but in reality it’s closer to Bogatell). If you have small children I’d advise to walk a bit (additional 7-10 minutes) and go to Novo Ikaria beach, known for being rather a family beach because it’s less wavy and you will see more children and families there indeed. However Bogatell beach is good as well, at least before the noon, when there is no much people...
It’s around 10-12 minutes to Iiacuna or Poblenou metro station so in case you have extensive sightseeing plans around Barcelona, you maybe a bit tired of walking from the metro station on your way back. However, this is an issue of Barcelona itself, that sightseeing places scattered around the city and for some or many of them, there is no close metro stations nearby. At least from Iiacuna line, metro line L4. As an example, try to get Tibidago or CosmoCaixa museum located in almost the same location: you will have to change 2 lines, take a train and a bus at the end.
Poblenou area is a nice area itself, much less noisy than historic center and very close to the sea. If the sea is your must have, perhaps this area and closer St.Martins near Novo Ikaris beaches are the best districts in the city. Since Forum is a bit far away. As to Barcelonetta beach and historic center - they are much more overcrowded and less secure.
There are not much to see around however you may take a taxi (there is a nearby taxi parking) and the metro. For shopping you may visit Glories shopping center, a nice area and the most modern shopping place in a Barcelona. It took around 20-25 minutes by walk by Poblenou to reach it and we were more satisfied than visiting traditional places around Catalunia square (angels portal street etc) with lots of people and eventually, less choice (we were in Barcelona during sales season).
We’ve spent almost 2 weeks in this flat and we’re fully satisfied. In terms of security this flat exceeded our expectations. It has a safe, like in the hotel. It has a decent alarm system, so you may leave your valuables in the flat without worries. It has aircon in ever room and it’s efficient.