OS Giken is totally fine for daily driving, as long as you don't mind higher upfront cost and the much pricier diff fluid.
If my car were daily only, I don't think I'd be willing to justify the cost and just go with a Wavetrac or Quaife. Now, if I did want the characteristics of a clutch type LSD and also had to daily the car, the OS Giken would still be my first choice, because unlike other aggressive clutch LSDs I've tried in other cars, there's no perceivable lockup noises or binding on tight turns.
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