Took about 2 months to be able to purchse this lens from BestBuyOnline trying to use the Financing plan and waiting for site reps to respond to promises of "we'll get back to you as we fix your tech support issue.... not sure I would try to purchase from bestbuyonline again, but in the end, if you have determination, where there is a will there is a way.
Firstly despite what the bbönline website posts, and what the bestbuyonline phone reps adamantly declared about what comes with the lens, what you ACTUALLY GET IN THE BOX IS:
Front Lens Cap E-67U, Rear Lens Cap E, Lens Case LP-1219, Lens Hood ET-73 + 100MM 2.8L IS USM MACRO LENS.
Be aware as you cannot pick the lens up at the store, you can only have it shipped via FedEX (who delivers only btwn 9-5, and not on Sat/Sun). So be prepared to receive your "we'll try again to deliver receipt". But call right away, and tell them you'll pick it up. My box was crushed when I received it from the FedEX office, I worried about if the lens itself was broken.... it wasn't... Had to be as a result of the Canon Styrofoam and the lens build quality.
The Tripod Mount D is not included with the purchase, but the lens bag DOES fit the lens with the Tripod mount attached !! Though I must say, I would have desired a sturdier case than the one that ships with the lens (direct from Canon in fact).
This lens is incredibly sharp, and the contrast is astounding! It's sharper at 100 2.8 than the new (and old) Canon EF 70-200 2.8L Is II USM!!! I cant put it down (unless i have too :) )
When working at Macro distances, you can still get a pretty clean pic with the IS; but the apeture is actually equivalent to a f 5.6, hence despite the IS, a tripod would be ideal.
The min focus distance is about 11" from focal plan. Yet, (in real useage situations) I am able to use autofocus when the object is about 1 to 1.25" from the front tip of the lens hood (when attached)... 100 ISO!!..handheld. Remarkable !!! (I'm attached to a Rebel T1i). (see sample pic attached - only stove top light was on in room)
Take advantage of BestBuys 18month Financing if you need (or must) to get it from Best Buy Online, but be mindful that BBO is not the only place to get a good (or better) deal... but whatever you do, if you're an insects/ flowers/ product photographer... get this lens. Its the right price for the right use.