I haven't had it exactly. Most of my girlfriends were just not into the Vedic lifestyle.
But I can say I understand what it is, and it is essentially taking a spiritual view of sex and intimacy, rather than just the physical act.
The principles are that orgasm is not the goal. More like touching, prolonging foreplay (indefinitely), and just savouring the moment.
The deeper you get into Tantric sex, the more techniques you might apply.
Like eye gazing, starting and stopping, and yoni massage which is like a full-body massage for a woman.