Beading is not a good indication of wax proctection. Beading is a sign of high surface tension.
A brand new car straight from the factory with no wax on at all will bead water due to the paints high surface tension.
For the money you wont be able to beat P21S (same as S100) from serious performance. £16 for the wax, £10 for the polish. Sure it doesnt smell of coconut, but hey, who cares...
For those of you interested in Zymöl, its worth searching the autopia forums about the range. It may well open your eyes, especially when you read about the guy who bought the $1500 wax for his ferrari. Zymol certainly has a good spin on "feeding your paint" and "letting your paint breathe" - how the hell can your paint breathe if its under 2mm of clear coat? Makes interesting reading.
However if youre happy with zymol, perhaps its best you dont search ;-)
Face