The only folks who have used the pro line of coatings are those that have been authorized by Optimum. Other than that Gloss Coat is the only coating available to consumers and many on here have used it. Gloss Coat is as easy as it gets in terms of application.
I personally was underwhelmed by it`s long term performance. On two occasions it struggled to make it a year. On one car it didn`t even get close to a year. Optimum reps said it was because their polishes were not used

. Cop out if you ask me as other coating manufacturers don`t say the same. If it were me I would consider installing Gloss Coat on my own. It`s pretty easy to do. The hardest part is the prep if you need polishing done.
Also most cars will need a polish in a year or two depending on what type of weather conditions the vehicle is exposed to. Not to mention wash induced marring and the possibility of small scratches from daily use. If it spends a lot of time in the garage then it will last longer like anything else.
Another thing is that the warranty only covers so much. I can`t recall what was mentioned on the optimum synergy podcast as I listened to that long ago.
Don`t let my post deter you from trying it. Just posting my thoughts.
Good luck.