Ultimate vs Royal
Purchased both directly from Purple.<br /><br />I had originally purchased the Royal thinking the Ultimate would be too large for my hard office chair....NOT TRUE. I could have easily just purchased the ultimate and walked away happy but having an extra cushion lying around isn't bad either. Not to mention the Ultimate is 1/2 inch thicker.<br /><br />Conclusion ? Purple is the Cadillac of seat cushions ? Maybe but from what i researched I couldn't find anything better so I chose Purple. They work ok but they aren't 100%  effective. Your behind and legs will still be affected by sitting but this will help as well as standing up every 20 minutes to stretch.<br /><br />I recommend going for the Ultimate for home/office and Royal for portability purposes.
Rating: 5 stars