I was looking at those a couple years ago. The big Japanese chain Bic Camera had them for order, but no return, and they had no demo units in the stores. So you had to take a gamble. That said, I wanted some kind of "street photography" and "always-in-the-backpack" ability for the R5. Once the 50/1.8 and 16/2.8 came out, that was my outfit and I haven't looked back. I also have Leica M 35/1.4ASPH, 75/1.4 etc but I can't just leave those in the backpack. Too fragile, in my experience, and too valuable.