Air Conditioner - Refilling w/Canned Refrigerant Work?

I have a 2013 Optima and it takes a few minutes before the air starts blowing cold. It eventually gets cold so I'm thinking it may be low on refrigerant, but not sure if that canned stuff with the tube/gauge is worth trying.

When I watch videos on YouTube there's as much positive as negative like anything else. Has anyone actually tried this and found success? If so, how long did it last?

Thank you!