I have a P52 as my work laptop. It is a tank, you feel it when you are carrying it around. Battery life is pretty good, three hours if I am not beating on it too hard. But, and it is a huge but, the power supply is 170w, weighs over a pound and is almost the size of an actual brick.
https://www.lenovo.com/ca/en/accessories-and-monitors/chargers-and-batteries/chargers/PWR-ADP-BO-TP-170W-AC-Adapter-slim-tip/p/4X20E50574
However, the screen is good, and the 10 key is really nice. The thunderbolt docking solution is terrible, I would avoid it if you can.