Barbed fittings: Good or bad?

If you put a screw type clamp over the hose on a barb don't tighten too much or you might get those barb to cut through. Or you can tighten a zip tie on there (I do this sometimes), the added pressure from the zip tie will surely keep it from leaking.
If you use the correct hose size you'll find that once you push the hose on (using trans fluid or Vaseline for lube) you'll have to cut it off because it won't come off by pulling.

Treblig