I've stayed in Hotel Aloha del Sol. Pretty decent place in a good location. Everything (supermarkets/internet/banks-ATMs/stores) is within walking distance. Since I was there last, I'm sure prices have gone up.
Also stayed in Hotel Platino. Decent hotel, but not as central to Calle del Sol as Aloha del Sol. About the same price as Aloha del Sol.
Both places are 24 hour places. Someone will be there to assist you at reception. Both places are safe. Do a search on the hotels here on DR1 for contact info.
Suerte!!!