Is this kit worth it over a brushed drill and driver set?

Yes for regular use. The brushless motors run cooler, last longer and deliver more torque per charge than brushed tools, which matters if you drill and drive most days.

Does the drill have a hammer mode?

This pairing is a drill/driver plus impact driver, so the drill is for wood, metal and driving, not masonry. For concrete and brick you need a separate hammer drill.

What batteries does it use?

It runs on Milwaukee's M18 18V batteries and comes with 5.0Ah packs. Any M18 battery works, so existing Milwaukee owners can share packs across tools.

How does it compare with DeWalt or Makita two-tool kits?

All three are brushless pro-grade kits with comparable power. Milwaukee's edge is its M18 ecosystem and rugged build; DeWalt and Makita offer similar performance, so pick the platform you already own.

Is it too heavy for home use?

It is heavier than 12V compact drills, but the extra power suits decking, framing and heavy assembly. For light around-the-house tasks a smaller 12V kit is easier to handle.

What comes in the box?

The kit includes the impact driver, the drill/driver, 5.0Ah M18 batteries, a charger and a carrying case. Bits and drill bits are generally not included.