Beware of cheap bearings constructed of low quality steel with poor heat-treating. These tend to fail prematurely. Bearings should only need to be replaced once during typical car ownership.
Cheaper hub assemblies might include bearings that are smaller than OEM, which is another factor that could lead to early part failure. Still other cheaper parts contain double ball bearings rather than one stronger bearing. If possible, avoid these choices.
Note that manufacturers recommend a torque wrench rather than an impact wrench when installing. That’s because an impact wrench can damage axle nut threads and CV joints. Plus, the impact wrench can prevent proper torqueing of nuts and bolts.
Always consult your owner’s manual first. Follow the manufacturer’s recommendations to make sure you don’t void any warranties.