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In viewing the moon recently, including the occultation last week, I discovered that my 6.7mm and 4.7mm had horrible glare when part of the moon was outside the field of view, i.e. any time you're looking at the terminator. This made observing the occultation pretty much impossible and I switched to my Pentax 8.5mm instead.
I've since read that this is a known issue with some of the ES eyepieces. I believe there is a fix involving dark felt or something around the inside of the barrel.
They are still very good on planetary, but for the moon they're a bit of a washout.
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