Hampton Inn & Suites St. Louis/Alton offers a variety of experiences for guests. Some reviews highlight issues such as live and dead stink bugs, torn couch cushions, and poor room cleanliness upon arrival, with one guest finding snacks left behind. Guests noted problems with room amenities, including heating units that made noise and a closed pool. Despite these concerns, many appreciated the hotel's dog-friendly policy and accommodating staff, particularly praising a staff member for exceptional customer service during an emergency booking. The rooms are described as nice with current decor, although some guests advised avoiding the highest floor due to air conditioning noise. Breakfast received mixed reviews, being described as just okay. Overall, the hotel has potential, but guests have experienced inconsistencies in room quality and maintenance.