Was delivered on time as described. However, the shipping costs were far too high to me! Have the converter immediately tried in my camper and tested with various devices such as magic wand, hand mixer, etc.. Worked just fine. However, all devices were below 300W power consumption. So on devices with higher power, I can not judge. Will I catch up later. Small criticism: The binding posts are a bit too small for my battery terminals. Would have an idea greater optimally. Am still very satisfied!