Overhyped and way too expensive... save your $$$! Sex is sex - some of these "practitioners" are just making things complicated with the whole "tantra" shit.
Eat healthy, sleep well, exercise regularly & don't stress yourself out - and in most cases these 4 guidelines will help you enjoy your time with a girl of your choice (someone who checks your boxes - of course not all girls will turn you on - either through their looks or their behaviour or a combination of both).