Decided to put my early impressions here since I used to have the V10. I haven't used the V10 since March but I had about 5 months time with it before I traded it in for the S7 Edge. First thing I did was get it setup and download all my apps because battery drain is going to be pretty crazy during the initial setup and the device did get quite warm. After fully charging it to 100% I've spent roughly 6 hours with it. Here's what I've noticed so far...
1) Screen - Brighter than the V10 and more vibrant...of course not as vibrant as my S7 Edge but that's to be expected. At least its not curved tho!!! =) I'm running mine at 90% at the moment...mostly to try and get as close the brightness I've been used to on the S7 Edge. I'll probably tone it down once I get used to it...I know that will be a big drain on battery life.
2) Battery - Much better than the V10 so far but I'll need to test this more. I'll post my results in the battery thread. But its not draining anywhere near as fast as the V10 would.
3) Speaker - Huge difference over the V10! Much louder and sounds better too! Very impressed!
4) Fingerprint Scanner(FPS) - Had 0 issues setting it up and its the most responsive FPS I've ever used. All I have to do is tap my finger on it and the screen is unlocked. 1000 times better than the V10 and even a huge improvement over my S7 Edge as well.
5) Second screen - Big improvement! Larger font and much brighter when the main display is off. I loved having the 2nd screen on the V10 but didn't like that it was so dim when the main display was turned off....made it difficult to see notifications. Those problems are gone.
6) Build quality - Ok at first when I saw the design and realized they weren't bringing back the rugged back and steel side rails I was disappointed. I thought that was one thing that made the V series stand out from all other phones. But the V20 is solid! It's well built and feels premium. I love the slim bezels on this thing. I wish the phone was a little thicker...surprised at how thin it is....but I'm using a case so that makes up for it.
So far, I only have a couple of minor complaints and they mostly have to do with software. Theming options sucks and are limited. I selected the high contrast one and it looks fine. I remember watching some videos where I saw people change the color of the font and such so I need to play around with it more. I thought after a year LG would have improved upon their theme store(LG World) but its still a joke and has maybe 6 themes to choose from.
My other complaint is with the "Knock to unlock" feature. When I had my V10 I liked having the option to unlock it by using a knock code when it was laying flat on my desk and didn't have to pick it up to use the FPS. Well, they brought it back in the V20 but now you have to enter 6 knock code instead of 4!! This is annoying!!! Four knock pattern was easy to remember but six is just too many imo especially when you factor in mistakes.
Anyways, I love the phone so far. Great job LG!