Transformative in terms of the level of portability it gives my 5DII!
I am on my second of two business trips to Germany this summer. For my first trip, I rented a 17-40L and took my 85/1.8 and 135L. I also took my Galaxy Nexus smartphone. Guess what? Aside from the real important work appointments, I found myself leaving the 5DII in the hotel room and using my phone during after-hours. The 17-40 performed admirably but it's just not a fun lens to me. Not like the 16-35LII which I owned and sold. I put the 17-40 up there with the 24-105L. I have bought and sold that lens twice. Both are versatile but not fun to use.
So I was home between trips for 10 days. My real desire is to buy the 24-70LII but that couldn't happen. I also thought about renting the Tamron 28-75. (I briefly owned and returned the Tamron 24-70VC.) Instead, I took a small $200 risk and just bought the Pancake!
And I am glad I did! Now the 5DII goes with me at the end of the day. Images are sharp! Bokeh is good. Yes, one does need a second of more patience for auto focus as compared to the 85/1.8 or 135L but its versatility more than makes up for this! I even like the versatility of 40mm!
What a great buy!
So my advice to all the fence-sitters: just drop $200 and do it!



