It does work quite well

Downloaded Apple Store version (Data Recovery Guru). I needed internal SSD and HD work. Downloaded Site version (Mac Data Recovery Guru). It worked. Registered it to facilitate recovery function. Clicked on Registry document in Download folder. App wouldn’t open. Deleted Apple store version using Launch Pad, Deleted Site version using Trash Can. Re-downloaded the Site version. It self-registered. It works. Proof it’s mine is my User Name and email shown on upper-right screen when App is running. Maybe the unfortunate reviews were computer/User problems. For me, it works fine. John E Avery Canon City, CO

JohnEAvery about Data Recovery Druid