By law in the Czech Republic, all donations are anonymous and have to remain so forever. You send a wish-list to the donor coordinator and you request a date. They then reserve a donor for you for that date. I cycled in Zlin, which is a university town. The university is right next to the clinic and is where the clinic's pool of donors is mostly from. Our daughter is lovely and healthy and bright. We adore her. But we can't have a full-genetic sibling because the donor we used is no longer available. Since she's not allowed to even know if the donation was successful or not, the donor can't be contacted to be asked to donate again.
It's much cheaper than in the US. You get to take a European vacation AND cycle for less than a fresh cycle in the US. Zlin is located near enough to both Prague and Vienna for easy overnight trips there.
The standards are good. Clean and professional. The Czechs do, however, give less stims to the donors than US clinics do, so you tend to get 8-9 eggs and not the very high numbers we sometimes hear about on these boards. If you have frozens (which is NOT the goal of the clinic -- they aim for 2-3 blasts to transfer and highly recommend transferring blasts instead of 3-day embryos), they have to remain there. You could, however, fly back alone for another transfer of frosties (and I recommend paying the about-$70 to have your husband's sperm frozen there for a possible second fresh attempt if you should ever want one without both of you flying back). Even if you both decide to go for a second transfer, using frosties or your partner's frozen sperm, you don't have to be there except for the day of transfer.
Here's the clinic:
Here's a support group of women travelling to the clinic. They're mostly American, but not all.
You have to join this group to post. Let me know if you have trouble doing it.
(I also cycled in Prague at Pronatal and was not happy with any of it.) I've also heard good things about the Ukraine, but don't have any personal experience there.