OSIM at Jem is a massage supply store at 50 Jurong Gateway Road, #B1-46, Jem, Jurong East, Singapore, rated 4.9 from 262 Google reviews.
A massage supply store is easiest to use when you know what the equipment is for. Chairs, cushions and massage tools vary a lot in firmness, weight and build quality, so try them where you can and check the warranty. Ask whether a device is designed for home use or for professional settings, since heavier machines are not always built for daily use. Check replacement pads, covers and accessories, because these wear out and are often sold separately. Regulars tend to buy one main piece of equipment and add small accessories over time.
Jem is a large mall beside the Jurong East interchange, so the shop serves nearby residents and people already out shopping for the day.