For day hikes and my walk home car kit I carry a Stanley pot because it fits in one of the bottle holders in my pack and holds a gas canister (plus a bag of rice or whatever). I use an MSR Pocket Rocket to boil water for noodle cups and such for the girls, and hot chocolate in the winter. It will nest with a GSI stainless cup as well which is handy. The Stanley pot is mostly useful for boiling water but does have a strainer in the lid for noodles. It is also very affordable at under $20.

I have the Czech kit which is really cool but kinda heavy. Double nested pot with handles that actually keep the system together. I have the British kit (the nested boxes) which is also useful but heavy. All of my emergency kits have canteen or GSI cups and esbit stoves.

For backpacking or more advanced cooking with the family I have an MSR Quick 2 system (I don't use the cups) with the flex fry pan nested with them. I usually use a Whisperlite International stove for these, and they give good flexibility for the weight for feeding 4 people.

The MSR system replaced an older aluminum non-stick set that is very similar to some of the REI systems now. It was useful but didn't hold together as well in the pack as the MSR does. It relied on an elastic strap to hold the lid onto the pot and that always seemed to come apart in the pack, spilling whatever contents were inside. It did cook well though.