Will this fit my laptop?

Only if your laptop uses DDR5 SO-DIMM slots. It will not fit DDR4 laptops or desktop DIMM slots. Check your model's memory type and slot count before buying.

Is 32GB worth it over 16GB?

For heavy multitasking, virtual machines, large photo and video projects or many browser tabs, 32GB removes the memory pressure that 16GB hits. For light web and office use, 16GB is usually enough.

Does it work at 5600 MT/s in any laptop?

It runs at 5600 MT/s only if the laptop's memory controller and BIOS support that speed. Otherwise it drops to a lower supported speed, which is normal for JEDEC memory.

Can I mix it with my existing memory?

Mixing with another brand or speed can work but may force a lower common speed or looser timings. Using the matched pair together gives the most predictable result.

Is CL46 a problem for gaming?

CL46 is standard for 5600 SO-DIMM and fine for gaming, where capacity and bandwidth matter more than a few cycles of latency. Enthusiasts chasing low latency should look at tighter-timed kits.