Is this a good first hammer drill for a homeowner?

Yes. It covers drilling, driving and light masonry in one compact tool, and it shares batteries with other DeWalt 20V Max tools. For frequent concrete work, a full-size hammer drill or rotary hammer is a better fit.

How does it compare with DeWalt's XR hammer drills?

The Atomic is shorter and lighter but has less hammering power and runtime. The XR line is the better choice for daily masonry and heavy drilling; the Atomic is better for tight spaces and mixed tasks.

Can it drill into concrete?

It can handle small holes in brick and soft concrete with the right masonry bit. Hard concrete and larger diameters are slow going, and a rotary hammer is the right tool there.

What batteries does it use?

It uses DeWalt 20V Max batteries, the same packs as the rest of that line. Larger capacity packs add runtime but also weight.

What comes in the kit?

The kit typically includes the drill, a 20V Max battery, a charger and a carrying bag. Check the listing for the exact battery capacity and included accessories.