Hi DolphinAJ. Steve is lovely - completely knows his stuff as he did his PHD on IVM.
At FertWA (at least when I was there), IVM was cheaper than standard IVF, mainly due to not having to use as many drugs etc and it being an innovative procedure. The last time I spoke to Steve, he mentioned that the success rate for IVM at the clinic was nearly the same as standard IVF - around 50% which is amazing.
I hope is able to help you :-)