Sensyo Homes was a fantastic place to stay on Santorini (we were in the Envision studio). We especially liked the location (Firostefani) as it had a more laid back, less touristic vibe (we felt) than Fira or Oia. The complex was cozy with a great view and plenty of tables and chairs from which to enjoy the sunset (we didn't brave Oia at Sunset any of our four nights because we thought the view from Sensyo was spectacular in it's own right).
The bed was surprisingly comfortable and spacious, and while the room was one of the smallest of our trip, we had no problems finding places to store things. The shower is kind of funky in the sense that it's not separate from the rest of the bathroom, so expect wet feet if you want to use the toilet after a shower. We got around this by using towels to contain the water and being strategic with our shower timing - it's not a dealbreaker by any means. Wifi wasn't great either, but they are upfront about it - again, not a big deal for us. Overall, nothing was a big enough issue that we felt the need to reach out to Elvira, we just wanted to share our experience.
Would we recommend this place? Absolutely. The gentleman who introduced us to the studio at check-in was incredibly nice (as was the cleaning lady). The view is incredible. The communication was super quick. Do not hesitate to book any of the Sensyo Home rooms!