I don't have the phone, but I've touched it
I've finally seen and touched the HTC One in person. I was at an AT&T store. First thing I noticed was that it's not as shiny as the pictures I've seen on the web. The overall white and aluminum is fairly dull. Because of this the speaker grills don't stand out as much as I thought.
The phone is definitely big, but being that it's so tall looking, helps it appear skinny. Like some reviews have said, it is easy to hold even though it's big. The bad thing is, it does look too big in my hand. I'm not sure if I want a phone this big.
The speaker volume was not as loud as expected, but I was in a mall, and it was very noisy.
Seems like BlinkFeed is getting a lot of hate, but I actually like it. I already use the Flipboard widget on my homescreen. And I actually like Sense. And Sense 5 looks good to me. And also, since the HTC One is so powerful and fast, Sense wouldn't slow it down.
I would really like this phone, but I'm stuck on Verizon for a while.