I've had my V10 for 2 days now and I'm happy with it but not thrilled. The second screen needs major software updates, IMO.
The most disappointing thing about the second screen for me is that when the main screen is off, notifications flash by WAY too quickly, rendering the second screen essentially useless. Notifications should permanently stay there until you swipe it away. I have several sports apps that give notifications with a high amount of information in them, and it's impossible to read all the information when the software has the notification flash for only 1 or 2 seconds.
This has me then turning my screen on and checking the notification or unlocking my phone and checking it, which completely negates the purpose of the second screen. This needs to be fixed ASAP.
Also, the second screen is WAY too dim. Why is there no customizable backlight setting? Instead it uses an auto-dimmer which uses the sensor to determine how bright the second screen should be, which in my opinion is always too low. From an angle the second screen is completely non-visible.
So all in all, I would say the second screen has serious potential to be a game changer but with the current software, it's one notch above useless, in my opinion. Super dissapointed