Planet Fitness in Smithfield offers a welcoming and judgment-free environment where members can build strength at their own pace. With over 2,700 locations nationwide, it provides best-in-class equipment and a space suitable for everyone, including seniors who receive helpful guidance from staff. Members appreciate the affordability of the Black Card membership and the consistent availability of machines, making it easy to work out anytime. However, some reviews mention issues like absent front desk help, which can extend workout times, and occasional equipment problems, such as malfunctioning machines. The gym's design features a darker ambiance with no windows and a black ceiling, which some find cave-like. Despite these minor concerns, members generally enjoy their visits, highlighting friendly staff and the convenience of the location. Overall, Planet Fitness in Smithfield is seen as a good workout spot that could benefit from some updates but remains a favorite for many due to its affordability and welcoming atmosphere.