Buy for Good Performance
They can't match the power of the Pixel 3 or another high-end devices, but the Pixel 3a has enough firepower for most people.
The Pixel 3a and Pixel 3a XL feature 4G of RAM and a Qualcomm Snapdragon 670 clocked at 2.0GHz + 1.7GHz with Adreno 615 Graphics.
This is a mid-range processor so you won't get the type of power you get on flagships like the Galaxy S10 or iPhone XS, but you'll still be able to watch content and enjoy games.
The Pixel 3a comes with a 3,000mAh battery while the Pixel 3a XL comes with a larger 3,700mAh battery. We haven't been able to do long-term testing with them just yet, but battery life reviews are very good. They should be able to last all day.
If you want top of the line performance, you'll have to look elsewhere. That said, if you want a phone that lasts all day and handles games and other content pretty well, you might want to pick one of these up.