Watermill Express in Hudson City has a convenient location that is easily accessible by car, with a wheelchair-accessible parking lot and entrance. The company's long working hours from midnight to midnight every day make it a great option for those who need to refill their water bottles at any time. However, there is one recurring issue with the dollar bill slot that accepts bills irregularly. Despite this, the water quality is generally good, and the prices are very reasonable, making it a popular choice for customers. The company has a website where customers can find alternative locations if needed. The employees seem friendly and customer-focused, as evident from their responses to customer feedback. Overall, it's a decent option for those looking for a place to buy bottled water or have their water heater repaired, but it could improve with more consistent bill acceptance and slightly better water quality.