Pickering is 100% fail for me too.
They sent them 3 weeks after they said they would, and outer branches were already brown. The main ones were green, so I had some hope. We've had the hottest June ever, with 12 days over 100, so that didn't help. I mulched them and misted, but they were really too little and couldn't transition from complete dormancy to high heat, even with several days getting babied in the sunroom. I lost a few Burling roses this year also. They were the smaller ones, and once again, I think it's the extreme heat that did them in.