The main problem for me is mpb's inconsistency with regards to customer service. On Dec 20th I purchased a lens from them with no special shipping instructions because it was Christmas week and I expected terrible deliveries from whoever they use, so be it. However, to my surprise, I received the lens on the Christmas Eve, New York to Los Angeles! But here comes order number 2, completely different outcome. Ordered another lens on December 27th and as of today, January 3rd not only has it not shipped, but when I called their NY office their voicemail said they were closed today?!? I cancelled the order because I needed the lens for the end of this week and also because a flag went up do to the Jekyll and Hyde customer service. You never know what you're going to get!