Similar to other reviewers, I found loose and shifted parts upon arrival, but was able to fix everything by disassembling and re-assembling the parts.

Initially, I noticed some high-pitched buzzing noise and off-center heating patterns when boiling water in a large shallow pan.  Shining a flashlight through the glass let me see that the center burner was shifted about 1 inch off center.  Frigidaire customer service confirmed this was not normal and offered to send a technician, but I found it easier to repair myself vs scheduling time away from work to meet them.  It took about 20 minutes to remove 10 screws, lift off the glass top, put the parts back in the right place, then screw the glass back on.

After repair, the noise is mostly gone, and everything seems to be centered and working well.  The value compared to similar induction cooktops made it worth the trouble.