I use lexol and have always been happy with my results. Funny...I had a car detailer tell me to use the leather cleaner on brand new leather and then always once a year after. I use the conditioner every month or two and my seats look great. It takes a minute to spray the seats and then give them a wipe with a towel. Lexol does leave the seats a bit sticky for the first day then they are fine.
The key (in my opinion) is the leather conditioner products is not really too important. The frequency of use is important. I hear too many complaints about leather peeling or looking bad in all different types of cars and the owner claims he taken care of his leather ONCE a year. WTF! Once a year? Not good. If you use any descent product (Lexol, Mothers, Chemical guys etc) every month or two your leather should look good.