All I'm told, they are a real maintenance issue AND get HOT!
They're bitch to dry, and if not done so properly will start to get smelly and funked up.
Looking at those models' pics, - for them it's a way of life and they have to allocate 1/2 day at least to wash, dry, and set. The means $$$ ! Like every 2nd – 3rd day? Hello!
It's with most everything else of these femme items, like lash extensions (they itched and I had to get rid of them, touch up every 2 weeks!), gel-coating your nails (every 10 days, and then stripping with acetone, eh), waxing (every ~ month), laser (ditto), and, and, and.
Though it's a great way to pass time in female company for hours on end.
If you have time and $$$ enough, why not?
I done some for a while but my budget started to look bleak so I stopped.
Also, it can get tricky if you want to do it all and remain stealth --- hey, who are we kidding?
One get rather close to hair dressers and beauticians, you know :-)
Axelle