Mark, I absolutely love 808. I've had it on a panel of my car's hood since November 8th, and It's been handling the salt, and road grime in stride. I've gone through one automatic tunnel wash, and a couple of ONR washes as needed. Still beading and sheeting.
My gf's truck has some on the same panel from the same day, but it got treated with M135 inadvertently. Before that, it had gone through a couple touch less washes, salt, slush, and was still performing beautifully.
To me, it's easier than Opti-Seal. After a long day of cutting and polishing, the last thing I want to do is miss a spot of wax, deal with "ghosting", and wonder if the OS "evaporated". This is my new go to product when using polishing cars with the Rupes system. I don't see myself using anything else, unless a customer requests a carnauba wax. Absolutely love and recommend it.