This would normally get 5 stars, because it just works with Windows 10. No messing around with drivers for random chip sets from anonymous websites with poor English.

However, two drawbacks knock off two stars.

First: The cable really is too short to do anything with. You are going to need an extension cable, either USB or DB9 - see below before going and buying a USB extender cable.

The second problem is that it has captive nuts on the DB9 connector. Now, there is no standard to define whether it should have nuts or screws, but the practical reality is that almost invariably it is the socket fixed to a device, on a bulkhead, that has nuts. So this is a nuts to nuts connector in practice, which means IT DOESN'T FIT, because the nuts get in the way.

The nuts are captive. You can't remove them. Typically, the nuts on the device you are connecting to hold the socket in place, so you can't really remove them either. I don't think that whoever designed this configuration has really ever used RS232/DB9 connectors seriously.

So what you need is a straight through DB9 extender cable, male to female, with screws on both ends. That solves both problems, but adds another $5 or so to the total price and a few days waiting for it to arrive.

Previous experience with random Chinese converters and their non-standard chipsets has been enough frustration to make this tolerable. But be forewarned and order the extension cable at the same time.

Same as the others with this problem: the screws (in this case female) are non-removable which means if the device you're plugging this into is female as well it will NOT work, will NOT connect. Most have their screws removable since this isn't standardized on this connection type (if the screw is female or male)...this one does NOT have these removable (probably as a cost saving measure), so it may not work on the device you want it to (or you'll have to break out the dremel and cut them off, or take a socket set and remove the ones on your device, or use a cable between the device and this programming cable, and/or cut the screws off that middle cable to likewise make it work - total PITA thus 2 stars for them cutting costs and making our lives just a little harder...)

This is a great product and has worked very well with no problems with drivers. Windows 10 does very well with gaining drivers for peripherals. I checked this using ATTOdiskbenchmark on windows 10 with a ssd and sata to usb 3.0 adapter and the read and write speeds were above 400 megabytes per second proving that this in fact uses the usb 3.0 protocol. If however you want to connect more that one usb device to this that draws as much power as the usb 3.0 protocol the included power adapter is needed as the express port can not power larger devices. Overall I would recommend this product rather than other express card to usb 3.0 adapters because it has worked so well and the company seems more reputable.

Originally purchased for use with some legacy hardware, such as some old PC accessories and a DexDrive (remember those?). I've used conversion cables like these in the past, and have found them to be pretty hit or miss. However, I was pleasantly surprised; I haven't had any issues thus far. Keep in mind, however, that this cable isn't some magical thing that will make your legacy devices work on new hardware; but, as long as your drivers are still functional (or you know how to write your own), this converter will help you get set up.

Does not play well with the Sandisk Ultra Fit drives.( https://www.amazon.com/gp/product/B01BGTG2A0/ref=ox_sc_sfl_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER ) It will not finish a large >10GB file transfer to this device. Same file transferred to the Samsung equivalent (https://www.amazon.com/gp/product/B017DH3O5A/ref=oh_aui_detailpage_o07_s00?ie=UTF8&th=1 ) without issue albeit at a VERY slow rate. Jumped through several hoops to find the latest firmware and drivers but they didn't help. This is the second ExpressCard USB 3.0 card I've tried and this one isn't much better than the first one which I returned. I does read/write small and large files fine to my MyBook external drive. I did try file transfers with and without the external power adapter attached.