I have had long-standing lower back problems and, as much as I like my Prius, it was killing my back. The seats "feel" comfortable, but the reverse angle (butt lower than the knees) compresses the disks in the lower back. After a while, anyone with lower disk problems is going to know it!

I finally stopped by a back store and bought a hard wedge--the soft 'memory foam' wedges are comfy, but you end up sliding off the seat in turns--combined with the bucky I've had for a while (with about 2/3 the buckwheat removed), the seat now works great.

PS Other than this one (huge) issue, I LOVE my car. And should get a cut from Toyota as since November I'm responsible for at least three other folks buying Priuses.

-sd