The USB port is well made, but it is something scratch- and Schlieren prone. The power cord is removable and therefore replaceable (if necessary, if the length is not sufficient or there is a defect). My USB charging cable stuck allesammt fixed in each port (which is not self-evident).
Even its purpose - to load - satisfies the device satisfactorily. It is therefore not in a prolonged charging time. The operation is of course quite simple and I simply say once "foolproof".
CONCLUSION:
Would not the sensitive surface, I would it 5 stars because the device is otherwise technically perfect and price is within the normal range. So I (really good) awarded 4 stars.