Our stay at the apartment was great. The hosts are so kind and hospitable - they gave us fruits from the garden, eggs from their chicken, even grilled fish. Also they picked us up from the ferry and took us back there on the day we left.
The apartment is also very nicely furnished. Only the matress can be a little hard if you‘re used to soft ones.
We visited Kalymnos for climbing and for that cause the apartment is a bit far off. If you want it quieter than in Masouri, it‘s a reasonable choice though. The drive to the crags is maybe about 10 mins longer.