Thanks, everyone, for the nice feedback. P.S. My comments regarding the USB dock were not intended to suggest that no one would like using it (I say otherwise), but rather that some users might find this "extra step" in lens ownership somewhat overwhelming.
LOL!...not only that...it is somewhat of a saga to pay $950 for a lens, send a copy back, get another copy and then that one being good I have to take my time to do a through test (again) and then fine-tune the lens on the dock.
Phew! I think it was worth it....because when I use the lens it WOW's me ...but that is an awful lot of my time to get something right that I spent $950 on? I would do it again..but this is supposed to be a well-paid-for, precision instrument...I cannot help but think I am doing a whole lot of work and giving of my time that should have been handled by Sigma... One positive note is that the lens is dialed in just for my camera body...and I know they can vary...so it is kind of a mixed mess...but in my case I did finally have a good outcome.
The lens is great!!!!
Oh...and Dustin...THANKS sooo much for including the link for the "Show Focus Points" plug-in for Lightroom!
That is just a valuable tool to have as the only other place I could check up on myself and my camera AF at time of capture was in-camera or with the Canon image software which I rarely use, if ever. That is just so cool to have loaded in LR where I do a lot of my post processing.