Great
I initially worried about seat belt fit since the left side is anchored to the pillar, and also the steering wheel/airbag positioning when the seat was farther back. The belt still fits properly, and using the steering wheel extension feature (which I had never previously used!) made my second concern not an issue. Initially I extended the seat back to where my legs were straight and horizontal, like in my old TR-4 (I was amazed that the brackets added that much room), but found that I could not exert sufficient force on the brake peddle, so moved the seat forward. Also, look at the on-line instructions in addition to the paper copy that came with the brackets (see next question).
How could we improve the process?
I dreaded the installation process, particularly because the seats on our Limited are electric, but the installation was quite simple, requiring no one else to help position the seat (which I thought might be necessary). However, the written instructions explicitly said the bent sides of the brackets had to face outwards. I could not get the inboard bracket attached, and finally went to your web site, where I found that for a 4Runner, the bent sides had to face inwards. You should revise the written instructions in big, bold letters.