I've had my Google Pixel for about 2 years and the battery just wasn't performing well and was discharging pretty quickly. So I wanted to replace the battery.
My first attempt ended up shattering the screen, due to my own idiocy. So I stopped and ordered a screen and then reattempted later. The second time, I made sure to heat the screen as told in the guide. This time it was a success. The battery guide was invaluable in showing where the clips and screws were and also how to apply the display adhesive at the repair. In total I used three guides: battery, display and screen adhesive.
It went well the second time, see above. I recommend really heating the display thouroughly with the iOpener. I recommend buying the full kit from iFixit, because the tools were just what was needed.