No piece of tech runs perfectly, but some run less perfectly than others. It' doesn't mean they're totally worthless; it just means they're harder to use. Sometimes the jank comes hand in hand with utter awesomeness. What's the glitchiest, jankiest, freeziest, aghhhhhhhhhh-iest device that you loved through and through, even when it was making you scream?
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My car's nav system. The moment you accelerate past 5pmh, it locks you out from 80% of functionality, making certain tasks even more dangerous. Yet, it's much better than in the last car I owned.