So, the success rate obviously depends on whether you are talking about the success rate of thawed ooctyes or transferred oocytes. In any case, the studies are a few years old and practices continue to improve.
I don't share any of this to dissuade you (or anyone) -- I just think the general opinion of success rates with frozen embryos tends to be a little more optimistic than the data suggest, and it's important to have an understanding of what may be in store so you can make an informed decision. It sounds like you are doing just that.
Not to split hairs, as I assume the above bolded bits are just (in effect) typos, but in case anyone less familiar with the processes involved is reading this, the order of the steps under discussion are --
1. Surgically retrieve eggs
2. Freeze eggs (if desired, to make delay possible)
3. Thaw eggs (if they have been frozen)
4. Fertilize eggs, creating embryos
5. Freeze embryos (if desired, to make delay possible)
6. Thaw embryos (if they have been frozen)
7. Transfer embryos to a woman's uterus and hope that pregnancy results
(Things can go wrong at any of those stages)
To my knowledge, oocytes are never transferred (into a woman's body, with the possible exception of GIFT cycles -- gamete intrafallopian transfer, but I think those have largely fallen out of favor as a treatment option), and cryopreserving
embryos (as opposed to
oocytes) is something that's been done for a relatively longer time (decades, rather than years) and is relative well understood and more likely than oocyte cryopreservation to result in a pregnancy. That is -- there are various options, with various implications and success rates, and it's easy to get them muddled in conversation on message boards like this one (but that can then generate further confusion among those not familiar with the options/terms).