What I like best about personio (and why) - A lot! It's easy to use; it saves me so much time every day by automating my daily tasks.
There really isn't anything that doesn't work well within personio which makes everything run smoothly without issues or downfalls throughout our team. Maybe one thing would be if you could have two different teams working together but there aren't too many problems with having both user groups at once as long as they're careful not to interfere between each other while still getting their jobs done.