Nh, just cheap "blonde" ply.
I have used it on every boat and given them all aweful beatings and they have stood up OK so far. I store them inside but apart from that, I don't really look after them that much and haven't had any problems yet.
Some of my cheap sheets are pretty ugly though. No voids, but patches of what looks like some sort of filler in the outside veneers. I just cut round that stuff, or use it for backing plates etc.
Because I have to get my cheap ply freighted in from Brisbane, I order 10 sheets at a time and they allways sneak in a couple of dodgy ones
The manufacturer assures me the glue between the laminates is quality water resistant stuff and I believe him. I have had some off-cuts outside in the rain for about 10 days now and there is no sign of delamination yet.
I can get the ten sheets for about the same price as 21/2 sheets of quality Gaboon marine ply. One day I might get real flash and use the good stuff.