Others say...

"best USB-Serial adapter"
The Keysapn High-speed USB-Serial adapter solved a problem that had me going through three other (cheaper) brand of adapter without good results. Plug in the Keyspan to my Windows XP pro PC, run the software, and voila, problem solved. Two days of messing around solved in ten minutes - now that's the best kind of PC solution....

"Great product: does exactly what I need"
Using this on a MacBook Pro running OSX 10.5 leopard. Works flawlessly to control my SUN boxes. Reliability is 95% (I've had this thing do strange things, but it was probably my fault...) This one's a little more expensive than others, well worth it...

"Keyspan is a winner!"
Turns out, I've fallen in love with Keyspan products! I purchased this USB/Serial adapter at the same time as their wireless remote control for my laptop and both work perfectly for everything I needed them to do. I'd read for several years that the Keyspan USB/Serial adapter just plain works for anything requiring a serial port. Most (all?) laptops are no longer providing serial ports and some (many?) of us still have need for said serial port(s). While there are many lesser USB/Serial adapters available at the big-box stores, they have issues with some peripherals. I need to control computer-controlled telescopes which require a serial port. Many adapters will do this, but UPDATING the firmware or motor-control firmware requires a more capable adapter - this one works perfectly for any and all tasks I've come across. Enough said...it just plain works, and works perfectly. It comes with a CD-Rom containing the drivers necessary to make it work properly. Be sure to following the instructions and install the drivers BEFORE plugging in the adapter. I couldn't be happier with this device.

"Why fixated bolts?"
Useless, considering it's 3 times more expensive than competing products, you'd expect it to have more flexibility. I have an A/V unit that needs to be upgraded via the RS-232 serial port -- it has the same extruding bolts on each side of the interface. Thanks to that, this product, which could have worked perfectly, is now blocked by this useless piece of non-removable metal! It's even soldered in. I don't understand how manufacturer's don't have a bit more foresight in a mass produced product. How dissappointing!

"Perfect solution for serial Wacom tablet"
I recently found myself needing to dust off my vintage Wacom tablet (ArtZ II), for an upcoming project. It's been several computers since I've used the thing and so was dismayed to find that 'modern' computers can't be bothered with the lowly serial port. What the hell is that all about?? Parallel port? Fine, get rid of it - it was an eyesore anyway. But the serial port? Who's bright idea was it to do away with it? I pay all this money, and I've got no serial port? Ain't right!! Anyway, I tried the PCI serial adapter card route and unbelievably it didn't work. It installed properly. Windows knew what to do with it, the Wacom software recognized the tablet during install, but the damn thing would not work. So rather than wasting time in tracking down the source of the conflict, I took the advice from Wacom tech support and installed the Keyspan adapter that we are all talking about here. His sole reccomendation was the Keyspan - that it was the only one he knew for sure would work. I bought it, installed it, hooked up the tablet, and am now making pretty pictures on my computer.

This is a high quality product that easily resolved a high challenge application.