Anyone had some experience installing aluminum edge restraint along the sides of a hardscape (e.g. pavers) pathway or patio? Do you like the aluminum better or the plastic (snap-edge kind) better? And why? Seems like the alum. might be good. I've also been told it's less expensive. And while that's tempting, I don't take short cuts. So if it's not as good as snap edge then I don't care how much less it costs. Just looking for some feedback here. I always see it at the trade shows and expos. Never wanted to make my customer the guinea pig on trying it, though.