Might as well ask people what brand of pop is best. Gonna get as many different answers most likely.
If it's got cracks, I agree with Trident...it's done as far as functionality
And you can champion whatever brand you like...it better have Lanolin in it.
No expert here, but I do a little leather work... got a Singer 26 against my living room wall and lots of Leather to play with.
In a hurry, smear it on heavy & turn the hair dryer on it... it'll soak in real fast.
If it is primarily a Wall Hanger, entertain wax to finish. My Wallhangers are all burned rifles, so they don't have leather LoL...but I think it can make 'em shine IIRC