IVM, at best, succeeds in maturing 40-50% of harvested immature eggs and successful maturation rates are often much lower. Even for those eggs that mature, success rates are substantially lower than from IVF. If your body can handle IVF, it is, on average, more cost effective per pregnancy.
The real skill required in this method is with the embryologists, not the doctor. If you're looking into IVM, talk to your clinic's scientific director as well as your doctor.