You do not have to utilize the complete clean, condition, and protect kit, to appreciate the Geist leather care kit.  This review will focus on the cleaner, in part due to having a more complete picture of that product.  With that said I did use the cleaner, conditioner, and protection product.

I am a big believer in using dedicated interior cleaner products like the Geist Rapid Leather And Vinyl Cleaner.  Algae appears to be part of the Geist secret sauce.  I was incredibly impressed with this cleaner.

I worked at a pace of one seat at a time. I sprayed a couple of mists onto an applicator cloth and proceeded to rub the product in for a few seconds.  I then used a leather brush to scrub the seats.  With the cotton towel supplied, I wiped off the residue/grime.

I was very impressed by the difference one round of cleaning on each area made.  I performed a second session for thoroughness.  The second round did ensure a thorough cleaning, but a majority of the seats were perfect the first time. A nice cotton terry towel or thin microfiber could work as an alternative though.

To put it into perspective why I became an immediate fan of this product, see the picture below.  This would be a theme.

I noticed these results even on one in which I did a wipe down with a solid maintenance product. I did go through the whole system.  Which meant me waiting 24 hours after the second conditioning step prior to applying the protectant, which would be the third step.  Realistically this is not going to be practical for everyone.  I had access to this car for many days, which is somewhat of an outlier even for me.  This does not mean you cannot benefit from even just the cleaner or perhaps going from step 1 to 2 or step 1 to 3.