I do not like that it does not have a BSI CMOS at it's core. If you're going to tout enhanced ISO and better light gathering, it really needs to be done on a BSI CMOS. Now the question is do I buy this 'reduced medium' format w/o BSI or do I buy a less expensive full frame with BSI?
If the message coming up every time doesn't grind you down, you can still use the older battery but it will wear down faster, certainly under intensive use. I've not measured the number of shots from each when just taking single shots.