We loved our stay at the Las hotel! We stayed there for 5 days with our 2 kids - we have gotten two rooms that were a sort of complex with connecting doors, very comfortable. Hotel is very conviniently located in the center of Gythio, a hand reach to cafes, restaurants and the promenade. The hotel doesn't have it's own parking, you have to find parking on the street - we didn't have an issue with that during our stay.
There's a pool on the hotel roof, which my kids enjoyed a lot.