I have had two these exact inverters for 6 or 8 months now - they work
Also have two of the Morningstar Pure sine 300watt inverters
One of them let the magic smoke out after 3 months of operation
Very impressed with this one - Sure there are some issues
Cut the plug end off and replace it with a proper connector
Unplug it when not in use and you are good to go
for the price they are a very good value
Low cost w/ Good quality - Not cheap but low cost
The difference between Cheap and low cost - Quantity Vs Quality