I just bought my first Bonneville and the leather on the seats is starting to show signs of cracks,they are light and you cant feel them.

What are the best products to use to keep the leather soft and prevent further cracking?

Thanks in advance.

Personally,I use the Meguire'* cleaner and conditioner once a month and the leather wipes each time I wash

I use Leatherique. Works really well at pulling dirt and grime out of leather and preserving the leather. A bit expensive but worth the extra cost.
http://www.leatherique.com/