Designed to improve your posture and keep you more alert, reviewers say the chair is easing pain through their back and hips — whether they’re working at a desk or working out.

Made with a 20.4-inch stability ball and chair frame with lockable wheels, this chair is compatible with most average desks. The brand says the chair is ideal for users from 5 feet to 5 feet 11 inches and has a 300-pound weight capacity. Plus, it comes with an air pump and exercise guide to really get you rolling. While it’s certainly a unique piece of office furniture, fans say this ball chair is the type of thing you’ll wish you bought sooner for how quickly and consistently it brings them relief. “Sitting in this for 5 minutes reduced my lower back pain,” one wrote. “It took a few days to get [used] to but after just 2 weeks I have noticed a HUGE difference,” another said.

According to the brand, the ball chair is made to employ “micro-movements” in your body, engaging muscles in your core to help you sit up straighter, putting less pressure on your lower back.

“It is absolutely amazing,” Lori writes. “...I no longer have shooting pains by the end of the day.” “I can’t say it has taken away the pain completely but, it HAS helped by reducing the amount of stress on my body, back and hips,” one shopper wrote. “And there is minimal pain at the end if the day.”