I went to Singapore three times in summer for family trip. Highly recommend Swisshotel. Located beside MRT (sorry, I forget which MRT station) and big shopping centre. Clean and fabulous rooms. There is a big supermarket at the basement of the centre, where you can find 亞坤記, yummy breakfast.
Another hotel, Redezevous Hotel, walk around 10 min to MRT station. 3-star, no swimming pool, but clean and tidy, friendly staff.