Low pay, and high insurance premiums if you don't opt for a HSA account.
No career track, pretty much stuck in whatever position you were hired for.
Never posts supervisor or corporate jobs internally for lower level employees to apply to, leading upper management to always hiring outside candidates with supervisory skills instead of promoting employees with knowledge of how they operate and teaching them.
Being employee owned is nice on the money side, but don't assume you have any say in what happens with company issues. Employee owned but is really owned by 5 people.
Upper management pushes culture and values on you like a cult while also doing the complete opposite.