I've had my T460p for just over a week now and I'm very happy. The 72Wh battery gives me 5-7 hours of light-to-moderate use without any significant power-management tweaking, and the WQHD display blows away the HD+ display on the T420 I just retired.
The keyboard layout isn't perfect, but the feel and responsiveness is excellent. The clickpad is a huge improvement over the trackpad, at least in my experience.
Processor performance has been great so far. It stays snappy with multiple virtual machines running.
I needed to upgrade the firmware in the two docking stations I purchased along with the laptop to get the dock-connected displays to work reliably. The only other hardware issue I had was with the 1TB drive in the old laptop; I was hoping that I could just clone and sysprep /generalize it but the 2TB SSD I cloned it to wouldn't even boot in the T460p. So I cloned the "stock" 500GB hard drive to the 2TB drive, swapped them, and reinstalled my core software suite (Office, Project, Visio and VMWare).
I then discovered that the 10 month old 1TB Samsung SSD from my old laptop had developed some hard errors; I was unable to copy one of my VMs off and had to restore it from a backup. The S.M.A.R.T data shows multiple FAILs. The drive is headed back to Samsung for "service," whatever that means with an SSD. It does make me wonder a bit about the 2TB model I installed in my new notebook, though ...
Love having a backlit keyboard, and a standard-size HDMI port is great for projectors and hotel-room TVs.
All in all, quite pleased!