Ive tried a lot of different leather cleaners and conditioners and without a doubt i've found that Gliptone cleanner and conditioner is the best, i do as a lot of detailers do and i hang a hairdryer on the rear view mirror for 15 - 20 mins and close the doors, this softens the leather and opens the pores, i have had no problems with holes in the seats as Gliptone is a liquid and gets absorbed fully unlike waxes that i've used
buff it and it leaves a nice matt feel to the leather
An added bonus is that it only approx a tenner for both the conditioner and cleaner