I've been building some of the Infinity Bourak terrain lately, but this stuff is on my list for when I start putting my Malifaux board together.
Absolutely use superglue. It doesn't bond the join like plastic cement, but it's a very fast, very strong join. The join is stronger than the material, even on just a 2mm wall join, so no worry of the join coming apart.
The material is flimsy when you're building it. It's foamed PVC, not MDF or HIPS. It bends and snaps easily. However, once built, the terrain is sturdy enough for gaming. Just be careful how you store it, really.
I've really become a convert to this material. Because it's not as rigid as HIPS or MDF, it's got more give allowing for curved architecture, rather than the city of lego blocks MDF terrain winds up looking like. Plastcraft are pretty clever with using edging to hide unsightly joins. Also, when building, I really like to just crack on and finish things, and PVA with MDF takes too long for my impatient self to wait on. And really, I just don't find much HIPS terrain around these days.