Speedway, a gas station and convenience store, has received mixed reviews from customers. While the location in Miamisburg is described as having gone downhill, with issues like inconsistent sweet tea quality and out-of-stock items, the West Carrollton store is praised for its friendly staff and convenient location. However, across the board, customers report problems with the store's amenities, such as broken or non-functioning slushy and coffee machines. Additionally, the Miamisburg store is noted to have security concerns, with reports of shoplifting and underage alcohol purchases during late-night hours. Overall, Speedway seems to provide a varied customer experience, with room for improvement in maintaining consistent quality and addressing security concerns, particularly at the Miamisburg location.