The idea of a universal remote control capable of controlling all your home entertainment equipment, including consumer electronics devices, specialized devices like demodulators or home theater PCs is very attractive. It's true that before long everything in your home will be controlled either by a mouse or a remote.
The Harmony is an excellent solution for anyone who wants to get the most out of digital entertainment by mixing traditional and computer-based components. Organizing its operation by activities is a stroke of genius. It's so much simpler to press one button to turn everything on than doing it device by device. Plus, the online Web configuration can only appeal to THG's readers, who'll be perfectly at ease with the logic used. And the equipment database is truly impressive Compare Prices on Logitech Harmony Remotes.
Naturally there are things that need perfecting. Some adjustments are a little complicated, like the time delays between two commands. The logic of the configuration wizard is sometimes a little complex. Things as simple as changing the order of the activities are complicated to do. But none of this is insurmountable.
Personally, I'd recommend the 880/5, because the display is an obvious advantage, as is the rechargeable battery. All you need to do is take the time to customize the display to make it a little more legible than the factory configuration.
If you're looking to save money, the 688 has the best quality / price ratio.