Loc Tite Interlocking

You can save some money over other companies but you will sacrifice quality for sure.
Steps to porch was all lose in 2 days after they gone, despite previously assuring that all steps will be glued and will be rock solid.
When I lifted them, there were virtually no glue, well couple drops on some stones to keep them together before work accepted.
Also few stones were installed chipped, actually were quite a few of them but those that I spotted and asked to replace were replaced.

Anyways, looking at the work done, I would spend bit more and get company that value its workmanship and reputation.