I have a pair off Crispis that I love and have worn for three years now and agree they're worth the investment. Although I've used Obenauf's in the past with good results I decided to use Kenetrek boot wax because Kenetrek claims it was specially formulated to ensure the rubber rand wouldn't separate from the leather. Although I have no proof that other waxes would be bad I can tell you that three years of kenetrek wax has worked great on my boots.
