Hunter and Harry were early to work on our cracked patio. They raised it as much as they could and sanded off the jagged edges. Hunter (I think) explained everything they were doing and answered all my questions.
No issues here.
We liked the idea of raising the concrete patio with a resin (?) as an alternative to digging it up and installing a new one. Our patio was plenty cracked from years of poor gutters and had lowered quite a bit from the edge of the house. It's more leveled now (and safer), but we had to fill in the remaining gaps with sand and Quikcrete.