I've got a couple of these lights.
Overall, they're OK, but their construction, feel and look are a bit on the cheap side. The end cap you turn to switch the light on and off is a bit loose (for both lights).
Maybe OK for emergency or occassional use around the house. Not recommended for frequent, critical and/or rugged use situations.
I haven't used these lights much since I bought them several months ago. I use just about every other light (many makes/models) instead of the TM-310H.