Guess you can call me "Mr. twenty-five Percent". I use Devcon for installation of comlponents, and filling gaps, thru holes, etc...but I only use Flex Coat for clearcoating. Have had too many bad experiences with the Devcon.
Think most of the guys are turned off of FC by the length of time required to cure (about 6-10 hours on a turner/dryer, and about 24 hours until ready for next coat of paint/finish). It is also a little less forgiving with respect to mix ratio. BUT...it is UV stable, adds less weight, seems to "ding" rather than "chip", etc. Definitely gives you a longer pot life, allowing you to finish more baits without mixing additional finish. I think it also gives a clearer, harder, shinier finish...letting your custom paint job show thru.
***For topwaters, I would be concerned about Devcon adding too much weight and interfering with flotation or lure action. Have had a few Rogues become quick sinkers after being clearcoated with Devcon.