In short Shit.
You dont get as good of a pressure conrtol, as you would with the standard Male cap systems. Plus because krylon has switched to the fantips they thinned out the paint more then ever.( To provent cap clogs and to get the buyer to buy more to do the job. ) Also dispite how well you get the cap to fit, you still run a chance of leaks from the connection point.
I have super glued fixxies and fats in place and it has worked out pretty good. You can not just simply swap out the caps though. I have also noticed that sometimes when you yank the stock fantip off the can, you can fuck up the valve jointing if you twist to much ( internal SNAP). Or snap it off all together when putting a cap back on the can. In the end Its just to much work.
Pretty much not worth useing for anything other then fills, but its thin. I will say this, The Chome's and Gold are still worth while to use and because of the fantip, it makes less sound and sprays wide. So like almost every other genaric Silver or Gold spraypaint its still good to use for fills.