Used all that stuff - I had a 928 with LOTS of leather to clean.
You put the Leatherique Rejuvenator on, throw a trash bag over the seats, and let them sit. It pulls all the gunk out of the pores in the leather. Then you wipe it up with the cleaner. Not going to make a huge impact on a car that's only a few years old, but it does bring back that new leather smell.

 

Thanks for the tip. I can actually buy it in Canada so will check it out.

 

I prefer the weatherTech digi fit. It just protects more of your carpet. I've had them for over 8 months and I've got them really dirty. I usually just hose them off when they are really dirty. If I need a cleaner I've used Adams polishes all purpose cleaner and some 1z cockpit interior cleaner after. I've also used 303.