Product review (5 stars): Perfect for long-term storage, just keep the lid shut for the best optimized efficiency.
We've been using this freezer chest for several months now, and a couple of observations:
- It works as advertised, with no regrets or concerns
- It holds temperature well (measured with a digital thermometer placed inside)
- The dial-range adjustment is extreme, so I would recommend one purchases a separate thermometer and place it inside. That will allow you to accurately adjust for your desired temperature.
- The aluminum-lined insulated interior is not meant to withstand the weight of normal-weight-range Thanksgiving turkeys, so either pick another storage location, or place them more genitally then I had done. Yes, I've slightly dented the inside of the unit, but not so much to impact it's capability.

No regrets, as it allows me to store 3 LARGE turkey's purchased at low-cost during Thanksgiving, for later cooking and enjoyment for another 11 months. Wow!

Lastly, my electric bill has not seen any huge spike, so while I can't speak to a specific utility usage, it appears very efficient to me.