Stayed here for a month. Overall a very good stay. The apartment is clean and tastefully decorated.
Despite being on a busy street, the noise level from outside was surprisingly low. Most noise came from inside the building partially due to there being a couple of windows that can't be closed. That's a minor tradeoff for well screened windows though.
The kitchen was pretty well stocked with everything you'd need for a short stay.
I found the bed very comfortable. There's a modern mini-split air conditioner that did a great job of cooling the bedroom and living room, even in the height of the January heat. The apartment also retains the temperature well, so even if you've left for much of the day with the a/c off, it cools off very quickly.
Very close to the beach and the bike station. The neighborhood is walkable and pretty much anything you need is a steps away. The metro station is about 10 minutes by foot.
Helena is friendly and responsive.
Definitely recommend.