Is the DCK299P2 worth it over a cheaper brushed kit?

Yes, if you drill and drive regularly. Brushless motors, two 5.0Ah batteries and the hard case make it a more durable long-term setup than entry-level brushed combos.

Does the hammer drill work on concrete?

The DCD996 has a hammer mode rated up to 38,250 BPM, so it handles light masonry such as brick and small anchors. For heavy concrete drilling, a corded rotary hammer is the better tool.

The DCD996 hammer drill, the DCF887 impact driver, two 20V MAX 5.0Ah batteries, a charger, a side handle, belt hooks and a hard carrying case.

Are the batteries compatible with other DeWalt 20V MAX tools?

Yes. The 5.0Ah packs work across the DeWalt 20V MAX lineup, so they can power other bare tools you own or add later.

How does it compare with the DCD996/DCF887 bought separately?

The kit bundles the same two tools with two batteries, a charger and a case, which is simpler than buying each piece on its own and gives you a matched pair from the start.

Is it too heavy for home use?

It is heavier than compact 12V or 18V kits, but most homeowners find the power worth it. If you mostly assemble furniture or work overhead, a lighter kit may suit you better.