What does the software or service do well? Malwarebytes detects and gets rid of viruses that may be infecting your computer including Malware. I'm glad I had installed on my computer.
What does the software or service not do well? It doesn't eliminate the junk that may be infecting your browser and can effect your entire system if not removed.
What do you wish you had known about the software or service before using? I wish I had known that it doesn't remove adware from browsers.
Have you used a competitor to the software or service? If so, how does it compare? I have tried Avast antivirus software. Avast actually downloaded some adware to my browser -- and it took a long time to remove. I will not use Avast ever since.