I used it about 6 weeks ago and the neck of my carboy cracked, even with a blow-off tube attached. It's the Schwarzenegger of yeast, at least in my 1.5 yrs of brewing.
I recently brewed a coffee stout using the WLP 007. It looked like egg drop soup on the stir plate. I'm now 10 days into fermentation. Checked the gravity last night and was at 1.016. OG was 1.064. Activity is nearly absent in the airlock too. Gonna keg this weekend and add my cold steeped coffee. Next up, ESB. Gonna use the east cake from the stout.