
I ordered the Logitech Harmony 550 while Amazon was running a recent rebate, so I’ve only had it on hand for a day… However I already feel like it’s $75 (after rebate) well spent.
Compared to the 520, the 550 seems to have a better build quality. It’s more solid, the buttons respond better, and the back has a nice rubberized coating. I thought the 520 looked pretty sharp, and the 550 looks even better. The 550 adds a few more buttons than the 520. As with the 520, Logitech kindly packaged 8 Duracell batteries — four for now, four for later.