I've got one
I bought the top model on the HP scheme - so I didn't pay full price. I got it because the one I had before was just too large to sit on my lap for long periods.
Windows can't really handle the high res screen - I've had to do some interesting jiggery pokery to be able to read the display but still have usable space.
It does get a bit hot underneath when it's on your lap, but if you turn the processor down a bit (advanced power options) that makes it much cooler and I don't really notice any reduced performance. [I only do that if it's on battery]
It worked really well when we went to Iceland - I just watched films all the way over. The battery life is good - I reckon around 7-8 hours of normal use (I've never achieved the 12.5 hours that is claimed).
Yes, I'd like a larger and faster SSD, but overall, it works well and is a vast improvement on my previous 15.6" monster laptop.