It's just right for me as well, the usefulness of the this huge clear/sharp screen, cannot be overlooked. I use my phone for everything. I don't use a computer anymore (well sometimes), and the v10 pretty much does it all, in a very comfy way. With a glass screen protector and a qbliq case, this phone feels bullet proof as well.
You won't miss your computer either.
This is the one stop shop of a device.
I am loving it.
I won't update to marshmallow until root is available for it. But for now 5.1.1 is running well, some people have reported no going back once you update, so this is something to consider, before going ahead and pressing update.
Which model are you using? I know at least the T-Mobile (H901) model has root for 6.0, but i know others like AT&T and Verizon are legging behind.