The ones I've been using most recently are
Fuizion.
Portion size is usually a bit on the small side for an an evening meal on its own.
The better ones are OK taste wise. I generally just take a couple of packs and use local shops by preference, keeping the freeze dried stuff for longer periods away from shops or emergencies.
Use is easy - just add boiling water and wait, but it's worth taking an
insulating pouch to keep it hot whilst rehydrating, and possibly a
longer than normal spoon to eat from the bag
A pouch is usually made from
Thermawrap and duck tape. Make sure it's big enough for an opened out bag. The same idea for a pan ("pot cosy") can also save a fair amount of fuel in normal cooking - bring pasta to boil, put in pot cosy and leave for 10-15 min: job done, no simmering required.