Any experience of this eyepiece? [Edit - actually, that would be impossible since it hasn't shipped yet

] [UPDATE - OK, I've found the CLoudy Nights threads and will have a read of them.]
USD499 with USD100 rebate [edit - for orders] until end of June.
http://explorescientific.com/eyepieces/100_degree.html
Found the FAQs:-
A: The new 14mm 100° Series Nitrogen-Purged Waterproof™ Eyepiece does not have the "undercut" barrel design. Instead the barrel design is tapered so that the eyepiece can be smoothly removed and inserted into the eyepiece holder, and will securely hold in position when locked in.
As far as optical quality goes, users will be pleased with the pinpoint images right to the edges of the field. Explore Scientific stands behind the optical quality and we invite direct comparison with other brand eyepieces of similar type. We think you will agree that the contrast, sharpness, and transmission characteristics are every bit what one would expect from the very finest eyepieces obtainable. We invite direct comparison, and we are certain that there will be product reviews forthcoming.
Q: When do you expect your products to be available?
A: We expect our products to be available for purchase by mid-June 2009.
Q: Are your products available for sale worldwide?
A: Unfortunately, not all of our products are available for purchase worldwide at this time, due to distribution agreements.