The best part of working with under defense was always knowing what to look for in any situation before getting too far into something without proper research. I worked with them during one of my internships where they were hired to help bring down an old web server from being hacked. They gave me great advice in how to approach things and helped us solve problems quickly. There's nothing bad about working with them! We had some good success with bringing down the webserver but there weren't many benefits other than solving issues quickly.