Spent tons of money on a polished concrete floor that we're not happy with
The tile came up, the slab underneath had patches, glue shadows and cracks, and nobody said they would show. They do. The fix is seeing a ground test area before the job is priced, so the decision is made on your slab, not a sample board.
Looks like a cut and seal more than a polish
A shine that scuffs off in the traffic lanes within a year usually came from a topical sealer. A mechanical polish is the concrete itself, ground and honed through progressive grits, so there's no film to wear off.
In a busy restaurant environment, spills are inevitable
Wine, citrus, coffee and grease can stain or etch polished concrete that was never densified and guarded. The protection goes on during the job, and cleanup habits matter after.