The studio is just perfect for your time in Sifnos. It's a convenient 3-5 minute walk down the hill to the beach. Her place is also very close to a lot of great restaurants. As for the studio itself, again, it's just right. And the view walking out the front door is amazing. Every morning I'd walk out I would pause for a moment to take it all in.
Carine was very responsive before and after I arrived in Sifnos to coordinate picking up the key and provided suggestions for getting to the studio. My ferry showed up a bit later than scheduled and I missed the bus and wasn't able to grab a taxi (only 10 on the island) but Carine was very understanding and flexible with my late arrival. It was a very stress free experience - which sums up the island and the locals perfectly.
I highly recommend staying at this location.