I got one this summer (we went for a small group of fun egg colors this round). She just started laying and is laying a nice silvery mossy green egg, very pretty. I actually came across your post because I was trying to figure out where the blue egg gene came from, since the Google machine says they are just crosses of Plymouth and Blue rocks. Legbar was my guess due to the crest but nobody mentions it in their info

Anywho, it's too early to say much, but she's been laying pretty consistently since she started a couple weeks ago and she's a sweet girl