I've used Collinite 845 for the past 18 months and think it's great. One of the best 'easy on, easy off' waxes I've ever used - good value, really good durability, a little goes a long way and I prefer it to Autoglym HD wax, which I'd used previously. The water is still beading on my car after the last application 5 months ago, which was applied over Poorboys Black Hole glaze on my Carbon Grey paintwork, and the car had a really deep, wet-look shine.
In some of the reviews I've read, people have criticised the packaging. I couldn't care less what the container looks like; it's what's inside the bottle that's important.