Dave, your statement has me puzzled. I've been using On/Off on my hulls for at least 14 years, and my most recent Scarab, weekly for the last 7 seasons.
What Vype was referring to was the fact once you use On/Off you HAVE to use it every week. The yellowing comes back twice as fast and no amount of wax will slow it down. It's simply TOO strong an application.
The very best product is the one that will do least of invasion on your hull or wax; simplicity of application without donning a chemical protection suit i.e. the closer to bare-handed applications the better; and finally, price. I can vouch for the Ringo Vype provides.
A friend turned me onto a great product recently and it's super cheap and simple to apply. It's Meguires tire/rim cleaner which is sold at Advance Auto in a clear spray bottle and it's pinkish in color. Spray on; let it work; rinse it off. The spray bottle makes it handier for applying to the bottom. The kicker is it's under $4.00 a bottle....