Wolfgang makes a good product. Compared to other waxes of its kind that price is nothing. With the free refill it's really not that bad of a price.
Danase and Collinite are very good products. Never tried NuFinish but it doesn't look appealing to me. As far as Ibiz... a guy at the Philadelphia Car Show pulled me aside for a demonstration as if I were a naive kid who knew nothing about detailing.
"With good wax, the water will sheet off and not bead up."
I decided then and there I wasn't going to trust that stuff. Water on a good wax produces high and tight beads.
If you want a good wax for a good price, try S100 made by P21S. Supposedly it's the same formula, costs 15 bucks. Also Meguiars NXT 2.0 is suprisingly good.
I love autogeek.net and detailedimage.com. Besides Zymol, Zaino, and a few select others, I wouldn't really trust anything's durability that they don't have on their site.