Used to love love this stuff....ordered it by the cases.
With the advent of WOWO sealants, $ per product ratio as well, I supposed Optiseal, BFWD, etc that is in my stash...Aquapel $ per ratio seems to be a expensive solutions.
I agree aquapel is very good. I currently have aquapel on my truck and think it works well and it's still going strong even after having applied it mid summer. On the other vehicles in the family I applied Gtechniqs G1 on the windshields and G3 on all the other glass. I might have to give the edge to G1 as it just seems to start working at a slower speed and it's ability to last for up to two years ( I'll let you know ). It's more expensive than aquapel so we'll see how things pan out but it is a very good product at least so far.
A big +1 on that, I have recently tried Opti-Seal and though it worked short term it did not do as good as a job as Aquapel and it lasted maybe a month. What ever is in Aquapel it allows it to stand up to the friction caused by wipers. Sealants and waxes don't do well with wipers dragging across them.
Still using it here, havent found anything to replace it yet! On some German sites they seem to advertise a similar sort of product but i havent found it easy to purchase to Aquapel it is!