I bought some of their Monster Catcher pencil poppers off ebay and they worked ok on YFT in The Seychelles recently and I've also got one or two of their GT Ocean 120s (worked on BFT in The Maldives). Both of these types have relatively small cups (around 27mm diameter) and are best worked by skipping across the surface.
I recently bought a couple of Big Mouths - yet to try them but they have bigger cups (around 40mm diameter)and, though I don't expect them to shift as much water as Heru GT Mania (cup diameter around 45mm) they should produce a reasonable pop.