Purchased cable for the digital display to assess rate of charge to determine when full charge is achieved on devices such as power banks that only have led indicators of approximate percentage charge. Cannot speak to durability of product as I have only utilized it around six times to date. However, so far, unlike some other reviews reporting early failure, my cable still appears to be working.The digital display is excellent for determining when the charge rate goes to zero (when the power bank is fully charged). When charging my power banks which also have a digital display indicating charge percentage, when my power bank indicates 100% charged, the cable digital display goes to zero W of power being transferred so I am assuming that this will be a good indicator to prevent overcharging of devices that do not have as precise an indication system.I also cannot speak to the accuracy of the display as I did not have a chance to compare it to a known standard. However, for what I am using it for, the actual numerical accuracy is not so important.However, one negative that I noted was that in comparing this cable with another 100W cable that does not have a display, it took about 20% longer to replenish the charge on my power bank in my tests (I timed how long it took to go from 40% charge to 100% charge on my power bank that has a built in digital charge percentage display). This is even though the “control cable” is 10ft long compared to this SOOPII cable that is only 4ft long. I would have thought that the SOOPII cable would be faster as the shorter length should result in less line resistance. I guess this is not as critical in my use case as I will probably not be using this SOOPII digital cable to fast charge my devices anyway as I really got this cable as a convenient way to compare the efficiency of various chargers. Again, probably not good as a dedicated metering device when it comes to accuracy (although it may be), but hopefully the digital “gauge” is consistent enough that it is OK to serve as a convenient comparative measuring device.I suspect that this cable actually does not allow as rapid charging as advertised, since the number does not come close to the theoretical ratings of my chargers. IOW, either the cable is accurate and my chargers are not outputting their rated power, or the numbers on the cable are low, or the cable is preventing the chargers from delivering the full power to the device being charged. It could be a little of each of the above as I noted that the charge times are longer with this cable than with some of my other cables when charging the same device (from and to the same charge percentage) and using the same charger so that the only variable is the cable being used.At any rate, the price of this cable is worth the novelty of the digital display as long as it continues to work. I will update (downgrade?) my rating based on whether or not this cable continues to work. I am limiting the power fed through this cable to no more than 30-40W as I do not want to adversely affect its longevity even though it is supposedly rated to 100W (based on other’s experiences with overheating, display failure and shorting out, I tend to doubt it can truly handle 100W so I am “playing it safe”, LOL). For now, I am reasonably happy with my purchase.Update: Was pleased enough with the cable that I ordered another one. Decided to compare the two to see how consistent the readings were. Both cables were the same length (4ft). Tested using 20000mAh power bank charging a non-PD iPad from 60% charge. Swapped between the two cables I had several times to see if there was any variation in the readings. One cable consistently read 13W and the other consistently read 12W (consistently meaning swapping back and forth several times). Essentially just under a 10% variation between the two. I did not see anything in the specs indicating what the tolerances were supposed to be. At any rate, good enough for my purposes but still shows a lack of consistency between the two cables (which means the accuracy of the actual displayed value one or the other cables, or both are suspect). Hopefully at least the durability with hold up.Ended up testing cable with a small USB multimeter. Cannot ascertain which reading is the correct one but added a photograph that shows that readings are within 0.9w of each other. Also, as can be seen, the display is quite bright and easy to read. The cable itself is quite flexible as can be seen in a comparison with a competitor’s cable which is stiff and cannot be “doubled up” on itself (the Soopii is on the bottom). The down side to this is that the competitor’s cable, while stiffer, is probably more durable and is much less prone to potential kinking. The SooPii cable housing (again, on the bottom with the blue connector) is slightly narrower than the competition, which ensures that it will fit into ports that have little clearance around your phone’s protective case for the connector. Please let me know if you find this review helpful.