I just bought an embarrassing amount of Hextech. Everything is very high quality.
The roads are great; there are a couple of pieces that don't fit together as snugly as others, but there's never more than a slight offset. Another note is that the coloring on the intersections is slightly different from the highway pieces. It's not a big deal, but it's worth noting for perfectionists.
Also, wanna say that the shipping from Fortress was top-notch. Everything was well protected and bubble wrapped. Not a single scratch.