What do you like best?
Recommending to friends and family to use Spybot holds much more weight when they see that this popular security software is free for personal use.
What do you dislike?
The lack of antivirus for the personal use Spybot version can seem a bit unwelcome, but bundling Windows Defender along with Spybot tends to make up for this.
Recommendations to others considering the product
In recommending Spybot to potential users, I would note that the free personal version typically covers everything that you would need an a personal antimalware solution. Bundle this with a good antivirus program, and Spybot tends to do much of the heavy lifting.
Moving on towards the professional version, it's a one stop shop for anything and everything you may need an an antivirus and/or antimalware solution. Moreso, the expert and advanced settings are very powerful tools in managing a secure IT environment.