Welcome @Rainbowbaby2016 and @siansmum.
I think Stacey has told you all I can. I have been to Zlin twice. Got the BFP but miscarriage at 6 and 8 weeks. Going back next week for a bit of travel then transfer 11/10 for one last try. Had further testing that Zlin asked for as well as using a reproductive immunologist here is Aus. I can not comment on other clinics. Price is around €4500 as Stacey said, but need to compare what's included. Zlin includes 12 months storage of embryos. My understanding is you can not import embryos back to Aus because anonymous donors.
Happy to to answer any questions you may have.