Does depend on where you are using them, these ones can be safely used outside the car, and the heatshrink acts as a strain releif as well. They are just the same as the crimp ones with extra protection, and just need a heat gun to soften the sealing glue and shrink the cover. If you don't do the heat bit, then they are exactly the same as the normal crimps.
Never had the standard crimp last more than a couple of years when exposed to the elements, even with doing like Rick and assembling them with silicone grease, but these outlast the average car.
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