Got the QUMOX SJ4000, ordered a month ago. From the delivery time I was very pleasantly surprised, the delivery should according to Amazon can take up to three weeks, but the camera was already after less than a week at my house. The installation of the device driver software went without problems and otherwise actually explained everything by itself. The recordings are excellent for Action Cam for the price of less than 100. So an absolute buy recommendation from me 5/5 *