Concrete edge restraint is one thing. (and I advise against it) The problem with *mortaring pavers* to concrete edge restraint is that if you're in a climate that has winter - sooner or later the mortar will freeze and the pavers will pop. Million dollar homes always have nice mortared brick and flagstone stoops, steps, porches, etc. And nearly every single one of them, sooner or later WILL have some brick or flagstone that pops loose during the winter. No, not the entire area, mostly just a few bricks or stones here and there. What happens is you get snow melt or rain on the mortared item. Water gets through the cracks, pores, etc. Gets between the paver and the mortar. It freezes. And then cracks or pops loose. Not a cool thing to have happen with an interlocking pavement. One day the pavers are fine. Come the end of March and Grandma is breaking her hip because the edge of the front walkway gave way. But with SnapEdge, you have piece of mind that you can install it and forget about it. Instead of Paver Pete spending 1 hr at the Techo Showcases (for the last 8 yrs) talking about door hangers - maybe he should be talking about the pros and cons of different edge restraints!