I caved...lol.
Installed it last night. Played with it for a few hours. There are definitely still bugs and I ran into several but honestly, they're nothing I didn't expect in a beta.
Some bugs I noticed in the couple hours I fiddled:
The dock overlapped the keyboard in the setup (although I was still able to type in my password)
Wallpaper aspect ratios, etc are all screwy when you put your own in and change the sizing/framing from the default.
When moving a folder off the dock, it left a visual representation of the folder overlapping another one at one point.
Sometimes the folders weren't clickable at all until I restarted.
Some crashes with apps in slideover occasionally as well as others
HomeKit toggles from Control Center leading to a portrait mode slider for one of my lights even though it was in landscape
Siri commands don't seem to be working for my Hue lights
At one point, some apps refused to close in AppSwitcher
At another point, everytime I did a small swipe it would bring up the entire AppSwitcher instead of the Dock (until I restarted)
I haven't done the betas since the iOS 7 betas, but I can say that personally, I feel like this beta is far smoother than I recall with the iOS 7 betas which drove me nuts with the first several iterations. All of those issues so far have been relatively minor to my overall experience.
Battery life seemed maybe slightly worse last night towards the end of the night. But nothing horrible or even bad I would say.
I charged all the way to 100% overnight and am fiddling with it a bit at work so we'll see how the battery lasts today.
So far, I've charged my Pencil up from 8% to 92%, have a bluetooth keyboard attached, and have been messaging and using Notes and Safari on it on and off and it's still at 100% after about an hour now at work.
Do I think it was worth it to upgrade to the beta? Personally, hell yes with the 10.5 inch iPad. Everything was far smoother than I thought (besides the bugs) and the new features are incredible including the onscreen keyboard (I didn't anticipate how much I would dig it). I've seen all the features in videos etc but I didn't really appreciate just how different it would feel using the Dock, Drag and Drop, and the new multitasking until I started playing around on it and putting apps up side by side, swapping their views, sticking slideover over, etc. I love that I can stick something like Messages in Slideover permanently still, slide it out to the right, and have it accessible in all apps while they're fully running (unlike before where it would pause them. I love that Slideover works differently in that sense than Split View and that the AppSwitcher only retains Split View configurations and not the Slideover (since that stays persistent throughout until you change to another Slideover app). And I love being able to split view two apps and slideover at the same time and have them all run, it's pretty amazing.
I also apparently have muscle memory from using my old iPad and always clicking the Home button to get to other apps, I had to catch myself several times last night from doing that and using the Dock instead.
But with iOS 11 and this iPad, this is such a huge upgrade for me when you consider that three weeks ago, I was still running an iPad 2
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