Airsoft replica lights never hold up to the recoil of RS in my experience. This makes them useless for long term use in airsoft or other demanding environments where impacts can and do happen.
I've never regretted buying real surefire/steamlight flashlights. I've had a lot of failed chinese flashlights over the years. If I don't have to rely on it, or its a backup of a backup or if its my throw away distraction light, or if its just for looks, then chinese is fine.
Then again, there is much cheaper out there if you want chinese lights.