I have the same experience... I am completely underwhelmed by the Klasse sealant product... I expect the sealant to create a high gloss, glass-like smooth surface, but I find that it is not as smooth as the finish after I apply the AIO product... So I have abandoned the sealant as well... My car is garaged and out of the elements most of the time, so I am good with just going with the AIO... If you have a better solution that compliments the AIO, I am all ears... Sounds like we share the same perspective here!

 

RLX 2020 I got the Opticoat Plus great warranty. Time will tell
Great stuff

 

I've had good experience using the following spray waxes. Easy to apply and lasts for a decent period of time.
- Turtle Wax Hybrid Solutions Ceramic Wet Wax
- Turtle Wax Hybrid Solutions Ceramic Spray Coating

 

Chemical guys JET SEAL

 

Wax can add some 'shine' but is really more of a protectant. Proper paint prep before wax is a key to a shiny finish. This includes proper washing clay bar, paint correction (polish or compound or both depending on the paint condition). Then do the wax to protect and preserve the shiny finish.