Help on canister stoves?

looking to add canister stove to my outings,
most likely iso/pro stove,

is name brand like msr pocket rocket worth it?
cons to lower priced coleman?
I do like to simmer so that's a factor,
my current cooking usually involves cold lunches and stick fire meals,
the speed and convenience of canister stoves has my interest.
have seen coleman dual camp fuel/gasoline canister stoves,
any experience with those?