I love my Joie of Seating Saturday Night Special. The area that surrounds your butt is rounded, whereas I think the Kirkey has square corners. The LaJoie just fits me great and is comfortable, even without the seat cover. I think they're in the neighborhood of $1,800 new, but I was fortunate enough to find a real nice slightly used one for less than half of that. And, I now know that it can take a real hard hit and keep me securely in place. It seems like a lot of $, but I'd buy another in a heartbeat. How much is your safety worth?