[breadzeppelin__]

I'm not sure that is still the case. I have an OP-Z and lurking forums for that device reveals tons of posts about build / hardware issues. Luckily my secondhand unit only has SOME broken components but it's pretty widely known as an incredibly fragile device with many design flaws

[hbosch]

The OP-Z is made of plastic. The OP-1 is all aluminum.

[tadbit]

There's plenty of products made with plastic that holds up well, even in the most harsh environments.

They decided to make the OP-Z out of plastic and it didn't hold up well. It's the fault of their poor design, or at least the type of plastic they decided to use, not the materials.