Though Apple seemingly left no stone unturned when developing its $5B Cupertino, California, headquarters, the tech giant may have overlooked one minor detail: workspace preferences.

Apple Park has taken a total of six years to plan and build, and while the new office features enviable amenities, including a 100K SF fitness and wellness center and a theater, employees are still grumbling about the space, the Silicon Valley Business Journal reports.

The culprit? Open office space. 

Apple employees are not hiding their discontent when it comes to the new facilities, with some even saying they hate it. The new headquarters have been designed with open cubicles, worktables and bench seating, a workspace design that is performing poorly when it comes to staff reviews.

While Apple asserts open offices encourage collaboration between teams, some executives, including Eddy Cue, senior vice president of Internet Software and Services, are holding strong in their defiance against the new facilities, saying their teams will be working away from the new campus, remaining instead at the former Infinite Loop headquarters, Bloomberg reports.

Apple is in the process of moving 500 employees into the space every week with 13,000 employees expected to be moved into Apple Park by the end of the year.