Hello All,
First post. 10.1 for me has been stable and no issues so far. I have come from using V8 for years so I have only that to compare to as far as speed goes but I used V8 when I still had the smaller CMost back. So the comparison between judging speeds with the CMost and the Aptus 75 is not applicable here. I like V10, it felt very comfortable to me after only a short time.
My salesman who also sells for other digital back manufacters gave me a good tip about performance and stablitiy. On the Mac at least, if you open up the activity monitor in utiliites and then open the System Memory window you can see how much RAM is free. Just quitting an application doesn't always make that memory available, some applications want to hold onto the memory and won't let it go and it becomes Inactive. You have to restart to free up that memory. Because large digital backs are such memory hogs when shooting quickly or for processing it's not always how much memory you have, but how much is available. I'm probably speaking to a way more knowledgable and computer literate crowd than I about this.