Throw the cheap stuff in and fill the system, if it lasts you all summer great, life goes on.
If it lasts a week, you're only out a few bucks.
You will need to decide how much your time is worth. I fixed my leak, I spliced the line, added a coupler and refilled the system using the a/c recharge kit from Autozone tool rental, that included the vaccum pump and manifold kit to properly fill the system, but I refilled with cheap R-134a first, no sense spending good money if it's all going to leak out.
For the average over time the freon leaks out because the cars old but theres no actual leak kinda a/c recharge...definetly use the cheap cans.
If all you have to do is add a can or two once a year, no biggy, go that route.
But it's all going to depend on how big the leak is, where it's leaking and how much to fix it. Only you can determine your price point on the repair.