I concur with Allinon72. The main thing with leather is maintenance. Weekly mild cleanings and for most a once a month deep clean and condition, depending on the frequency of which you drive your car (ie. touch steering wheel, sit on the seats, sit on the seats with sweaty clothes, dirty hands, etc).
Colourlock is a great company. Gyeon makes some great leather care products as well. Most of the bigger brands lost there touch with high quality leather cleaners/conditioners but I have seen turtle wax slowly start to come back with innovation. The smaller brands now making an impact is Colourlock, Gyeon, Carpro, P&S, Koch Chemie. All these aforementioned brands have great maintenance and restorative products to be used. Check out youtube videos on proper methods of cleaning and conditioning.
PS. Leather should always be MATTE. NEVER SHINY.
NEVER USE THAT ARMOR ALL GARBAGE
Some useful videos: