It's very easy to blow up and use it's very comfortable to use and the perfect size and it works very well for the price.
The title said it all. My knees will not touch the floor if riding.
I was a little skeptical about this and it being inflatable, but it inflates to be as hard or soft as you would like, and can be super sturdy. The pump made it pretty easy to inflate quickly. I expected it to lose air, but after 4 days of it being inflated, it was still as firm as when I inflated it. We haven't had a chance to test some of the functionalities of the pillows, but it works good as something underneath you for "lumbar support". For the price, it definitely does what it says, and I am more happy with it than we thought we would be!