Hum...actually there're many perfect hotels in Chiayi,for ex:Prince Hotel is very perfect hotel.here is link,(http://www.niceprince.com.tw/web/eng/map.html) It's the best hotel I live in chiayi. But chinatrust is also nice,too. clean.friendly.near the downtown.and chiayi has a Very elcellent "NightMarket"(on "wen hua Road".), You must to visit it.!!
I stayed at this hotel and the service was very nice. The room was large and clean. The Building was in good condition. Close to city center, lots of shopping and restaurants. The breakfast was edible.. nothing special but it was free.