I haven`t found anything, yet, that lasts as long as DG105 which is essentially ZAIO.
For ease of use and durability it`s pretty damn easy and durable. It protects just as well as any other wax or sealant I`ve used.
For water etching and bird bomb etching I don`t think any wax or sealant will significantly perform differently if it`s freshly applied. That goes back to that Mike Phillips quote, "Find what you like and use it often." (Or something like that.
Those saying Zaino doesn`t protect.. I would definitely disagree. You could have one bird bomb etch and another not etch depending on what the damn thing ate. So to say, "I had Zaino on my car and it got etched by a bird bomb (water spot) etc." isn`t particularly useful... unless of course you had the same bird, on the same day with a different sealant take a crap on your car and THAT part didn`t etch.
Same can be said about water spots. Some rain is more acidic than others. Some sprinklers have harder water than others etc.
There are some good videos on youtube that actually SHOW the differences between longevity of product, and IMHO this is really the only true measure of protection.
If product is there... you`re probably protected unless you leave the damn bird bomb on your car for hours in the sun. If it`s not then yeah you`re not protected.
I`d like to see more reviews along the lines of this:
This to me is a good review of various products.