I've been happy with Quest. I've been using them exclusively for about six Years for self serve and IBA. I will occasionally try the other brands' "latest and greatest" but nothing I've tried seems any better and most don't measure up. I just took 1/2 of a 5 gallon of an expensive "ceramic" offline today ($75/gallon)because it didn't perform as well as the Quest did. Quest does tend to experiment a lot so I'm always trying their latest innovation however I really need to settle down and simplify my stock so my employees won't be so confused. Quest is just now getting their hyperconcentrate line up to speed and will be offering those products pretty soon in 2.5 gallon containers. They have multiple unique scent choices in various detergents, foamers, and waxes.
Vantagloss, Total Shield Extreme, and H2off are all excellent premium wax type products with variations in what they do. Vantagloss can be used in a foaming application. It improves gloss and makes for a slick finish. Total shield extreme is the durable ceramic that offers extended protection, and H2off is a rain-x type product that offers excellent water repellency. They also have some
drying agents with ceramic properties.
Dissolvit is a good foamy all purpose alkaline cleaner that can be used for high ph presoak as well as tire cleaner.
My main complaint would be they offer too large of a product line. A new user needs help from a good distributor or rep to get the best performance out of their lineup.
Sorry, no experience with Stinger here, although Ive heard it works well I can't confirm.