not that great honestly. It sure does get me through the day, but especially standby is killing the battery.
The highly inaccurate battery statistics also don't really help. My usage is around 50% user apps and 50% system apps, 35-40% cellular (even when I'm on Wi-Fi all day!), display and so on in the hardware section. For the amount of time that I'm actually using the phone, the inefficient modem and Tensor really show their downsides in a low SoT and high battery usage.
My old iPhone which was used for around 2 years would outlast this Pixel by far.