Buy this cushion
I have a smaller purple cushion which has been really nice but needed something more since going back to college and sitting a lot. I thought the cushion lab seat cushion looked good, but was very disappointed with it. I will probably use that one in the car, where I need less cushioning. Anyway the large purple cushion is amazing. I am big, around 240 lbs, and even sitting for 4+ hours, I remain comfortable on it. Definitely worth the investment.
Rating: 5 stars