This is basically very popular with Asians, by which i mean it is not a western style, think dark carved wood and gold bits everywhere.
We were shown three rooms before we found one which did not smell of drains. They all looked out onto a brick wall , so avoid rooms ending with a three. The room on the front was better, I'd say an average 3 start hotel standard.
Staff were very friendly and helpful, we didn't bother with breakfast on the second day as there was nothing we wanted to eat.
If you are western and prefer a western style of modern hotel then try somewhere else, this cost us £55 uk which was only a little cheaper then the 5star places in town, and we Shpuld have stayed there. Even better, id recommend staying 30mins away by train at the shangri la in Tainan and coming in on the train, where we then went on to stay for the second time!