I got a ThinkBook for my office work. I returned it and got a ThinkPad instead.
Why?
1. Heavy and bulky
2. Screen quality is not as good as ThinkPad T-series
3. Keyboard is not as responsive as a ThinkPad
Thinkbook resembles old HP Elitebook laptops. On a positive note, ThinkBook supports USB-C charging and Lenovo's square-pin charger.
If you can pay a little more, get a ThinkPad.