Amazon Prime next day delivery was excellent. However, it stopped there. I tested the USB charging ports on my Android tablet (76% battery) and also my LG phone (79% battery). The USB ports seemed to work at first as both the tablet and the phone indicated charging but then stopped after less than a minute even though the red light was on. I have an inline USB charger monitor and sure enough, the charging did stop and the voltage dropped from around 4.90V to around 4.5V after only 30 seconds or so. All 4 USB charging ports failed to charge properly.
I haven't checked the functioning of the mains sockets. I shall be returning this unit DoubleYI Extension Lead Vertical Power Strip with Surge Protector 3m /9.8ft 4 Smart USB Ports 14 Way Outlet Power Extension Cord Socket
for a refund and will try another similar product.