Will this stove work will other canister...
Will this stove work will other canister fuel types such as the msr isopro fuel and other brands? Or does it only work with butane/propane mixes?
MSR Isopro is a butane/propane blend. The Cruz will work with any canister it can thread onto.
The MSR and Optimus, as well as multiple others like Snow Peak, Primus and Jetboil, etc use a standardized 7/16" threaded valve called a Lindal Valve (EN 417). So yes, if you find any canister with those specs, you have one that will work just fine on the Crux.