Stellar Receovery is obviously a scam for me. I bought their software right after the day my data was lost. I tried to retrieve the files using their software and all the data "recovered" were the files that were already on my Mac (which was like we have a copy of our current files).
I then asked for their technical support. The person who supported me on their website was totally a disaster. I myself did a better job recevering the files. After that, he confirmed that there was no single lost file retrieved.
I wrote an email to Stellar, and the answer I got was: "We would like to inform you that data recovery is dependent on factors like data loss reason, severity of corruption, overwritten activity and software works on "what you see is what you can recover". That means the files will be recovered in the same manner as you were able to see them in the preview window after the scanning is complete.
We tried to help you via remote access however that did not work."
Stellar is absolutely a scam!