We started with a small room and changed to a larger one, once friends of us arrived. The change worked fine, until we realized that we booked a room with a kitchen and ours didn't have one. Eve told us we could change to the other room the day after originally booked, or we could stay in the kitchen-less room and get a discount. We took the very fair discount. Overall we had a pleasant stay. Both rooms were reasonably clean, but smaller than they appeared on the pictures. In our second room the water pressure was pretty low, so my wife had a hard time cleansing her long hair.
Anyway, it was more than fine. If I'd go to Bugibba again, I'd have no problem with checking in at Sunstone again.