If you are looking for a safe place to sleep while in Fira (with aircon!) then this is the place. It is small, breakfast is also small, the pool is tiny, but it boasts great views of Fira and is in walking distance of Fira city centre without being in the midst of all the noise.
The mattress was very firm, but clean. Overall, the room was quite clean. The pool was not.
Sunny Days is a short walk away from the Fira bus station, so it is very easy to get around. We took buses to Perivolos, Oia, Akrotiri, and the airport with no issues.
We stayed here for a romantic getaway and I would recommend it for those that wish for quiet in a busy town and do not mind walking a little bit for the livelier areas.