The ease of setup - just drop in our docker container with netdaemon installed (which makes it easy to use without any prerequisites or complex configuration).
Also we like that they're constantly adding new features which helps us stay up to date as well! I can't think of anything specific about this tool right now but if there's something i should mention here let me know :) We are using some internal tools developed by ourselves so having an open source alternative was very helpful since then other teams could benefit from them too.