Nice hosts, but thinking of my entire Santorini experience and how physically exhausting walking around sightseeing can be in the heat, my advice would be if you can stay in Fira, do so. The place is abt 7min walk to the main road and from the main road another 15min walk to fira. The journey can get tiresome/tedious, especially coming home late in the evening after a long day in the sun. There's also a bus from the main road that is 1 stop (3min) to Fira and comes frequently- cost 1.80euros.
Other than that, it's a nice and tidy room- I agree with some review that said the place looks better than the pics, however you get what you pay for- it's not a 5star resort. For example, no soap/shower gel in the bathroom (that was a major bummer and shock the first morning!), and my shower was cold my first day- second day was fine. AC also was making a noise, and it was not immediately clear that it was working completely. Wifi worked well, however. I didn't partake in breakfast, which is 6euros a day. There's mini marts en route from the main road so I picked up fruits and such. Their father is super sweet and he picks you up from the airport for free, which is very helpful. You can take the bus (from the main road) or a taxi or use their father to take you back to the airport (the latter two cost 15euros).