I like that it is easy for anyone with no programming experience or knowledge to be able use this tool without having technical skills required by other more complex tools such as AWS Lambda functions etc which are very difficult even if you have basic coding ability! It has been great so far but there isn't anything i dislike about jenkins itself however some things can get confusing when trying to build your own custom pipeline steps (such as using groovy) compared to just writing code in java/python directly into them instead.
If someone was looking at starting their first job out from university then they could definitely benefit greatly from learning how to create pipelines through the web interface provided here - saves time over creating scripts yourself manually rather than waiting hours upon end whilst the script runs each day.