It's a nice concept and mine has worked occasionally since I first installed it. (I've had to reinstall it three, maybe four times).
It suffers, as do all Logitech products, from Bloatware. An absolutely ridiculous amount of files, registry entries, startup programs, etc, etc - all for a poxy mouse and keyboard!
As a matter of course, I have to keep my backup keyboard and mouse close by(also Logitech but works without any drivers). In fact, strangely enough, I've just come off the phone to Logitech support. the poor chap nearly eploded in a French paroxysm hen I told him I had the DiNovo, A QuickCam Fusion and a Harmony remote control (great product) installed. He now wants me to uninstall every piece of Logitech software, do a clean boot, reinstall everything again and get back to him!
I am thinking about installing a third hard disk dedicated to keeping Monsieur Logitech happy but.....
I do actually have work to do! One of the great dangers of our age is that we get so bound up in the process we forget what we were supposed to be doing with the PC in the first place!