Anyone done PGS testing on already frozen embryos?

M
After one failed fresh and one failed frozen transfer and talking to our doctor, we are considering doing PGS testing on our remaining 4 frozen embryos. This would require thawing, refreezing and thawing again for use if any are good. Has anyone done this before? My doctor said he is on the fence about this and so are we. It's expensive (about $8000) and I'm a little worried about thawing and refreezing, even though the doctor said there is not much risk. But a part of me just wants to do it because the thought of going through 3 or 4 more transfers and getting negatives is just too much to handle. And if they are all bad, we would save a lot of time and would be able to start another stimulated cycle to collect more eggs sooner. Just wanted to see if anyone has been through this or has any advice.