I can recommend Christopher's offer, the apartment is clean and there is all the equipment you may need (oven, fans, washing machine etc.) inside. Apartment is very well located, both for exploring Gozo and spending time in Marsalforn. Bus stop is very close, and you can get to Victoria and Mgarr directly, which is convenient. Marsalforn offers a variety of restaurants and a few beaches.
Communication with Christopher is very good, he responds to messages quickly and as everyone on Malta - knows English very well. He is nice and you will not regret spending your vacation in his apartment.