A must have if you are working out at home. great for all kinds of routines. I use one instead of a bench to lean back on and use free wheights, helps with your balance and coordination as well. If you have not used one yet, it makes for a way better work out. There are whole routines designed around these balls. This is new in the box, comes with fitness guide, a pump and everything. If you have any questions please let me know.