When looking for data recovery software, consider the following factors:

1. Features

2. File Types

3. Ease of Use

4. Compatibility

5. Preview Functionality

Remember that data recovery can be a sensitive and delicate process, so it's important to follow best practices to avoid further data loss. If you're dealing with critical data loss, it might also be a good idea to consult with a professional data recovery service, especially if the data is valuable and irreplaceable.