I recently purchased some of the new Pantene conditioner that you leave on overnight.  I was very unsatisfied with it.  I am usually pleased with Pantene products, but this product left my hair dried out instead of conditioned.

I actually liked it better than I do the other Pantene
products.  I always apply it  the night before shampoo
day (which I still do in the morning) so it gets shampoo'd
out.  It helps my hair feel soft and silky the next day. 
However, there are other deep treatments that are
just as good, or even better, if your hair doesn't like
this one.  I like Hasks Henna and Placenta, too.