My favoured cleaner/conditioner is Turtle Wax. I use it frequently because of the smell it leaves behind rather than for any obvious benefit. If water can't penetrate the surface I'm not convinced that conditioner will either, but the smell is worth the effort. I've also tried the Connolly kit, but it leaves a strong linseed oil aroma which I don't really like.
For me it's all about the smell.
