Sadly my A99 is heading back to Sony. I bought it to use it as a true hybrid - I shoot events and low-dollar TV commercials going from a 5d2 to a FS100 with a Nex5n and EM5 for stills to what I had hoped would be the all-in-one solution with the A99 - and my copy of the A99 just can't deliver. The video is noticeably soft in any shot where there's lots of detail. It looks worse than the 5n and EM5 in some instances. Shallow DOF shots look great and the DR is awesome, but when you need detail the A99 falls short.
I returned my camera for exchange hoping that it was a flaw in the first run, though that raises other concerns about QC if that's in fact the issue. I suspect it has something to do with the scaling/processing as the image still looked soft when the clean HDMI out was connected to my TV. Aliasing and moire is pretty bad too, the worst of any camera I've owned. Anyway, Sony is shipping me a new camera. If it shows the same softness my foray into Sony FF will be short lived as I really can't afford to wait another 6 months or more for it to get sorted with a firmware update. I'm not sitting on the camera beyond the 30-day return window if the new one has the same problem.
I will say on the stills side the A99 does impress. After getting the AF microadjust sorted I was really happy with the way my test shots looked. In hand the A99 is awesome, there are buttons for everything, the joystick and quick menus made changing anything not accessible through a button push a breeze, the dials matched my thumb and forefinger perfectly and I love, love, love the silent control nipple on the front and the tilt/swivel LCD - every camera should have one - and AF-d/AF-range are really cool features.
On the downside the focus magnify doesn't work in video mode and you can't have multiple AF adjustment settings for zoom lenses - so you have to log settings for different FL's and change them as you're shooting. It wasn't an issue with the 24-70z but my 70-400 is different at 70, 200 and 400. Those are my only real complaints outside of video IQ. It kills me to have this problem as I have an event to shoot on the 15th and I'm heading to Arizona in a few weeks and my plan was to shoot the Grand Canyon and family holiday stuff with the A99. Grrrr....