Well, the 903 is actually broken! Very odd it broke when I tried the 502. No problem, Logitech has another on the way to me. Logitech support is 100%. Please do not abuse their kindness though. I know people try to get free stuff from them, that is not right. Apparently there is a known issue with aged 903 main buttons. It is just odd it happened then. Just a fluke that's all. I do not believe in Voodoo LOL.
The 502 Hero is an otherwise great mouse plagued by lousy wheel. It may not bother everyone though. If you are used to a 903 it is going to be a PITA probably though.
I wish I could use a trackball honestly. They are too slow across 3x32" displays unfortunately. I noticed my 903 is on 6400DPI. I can't even believe that because it is not fast at all to me. When the new 903 whatever comes out, doubt I get it. The lack of tuning is apparently a big issue on my beloved Mouserug. It is a shame for me at least they left that out. Plus 502 on solid color cannot adjust brightness! That was a deal breaker too. It does fit my hand better but the 903 I think is smaller. It is overall the best choice for me. I have tried many other mice. I only use it wired with hanger is no big deal to me. I am concerned if I keep unplugging the mini USB it fails like all mini USB eventually do. At least phones switched to USB-C.
Well, this was rather unfortunate but at least Logitech took care of it.
For the Harmony Elite if it breaks, Logitech has the ability to lock it. So you cannot steal those. Shouldn't steal anyways. I am a Logitech Fanboy!
Edit, I repaired it myself. I called Logitech and told them not to send a replacement because I am honest and value their decency. They said it is already shipped just use it as an extra! Honestly made in China these probably actually cost $1USD but still they don't have to do that and hardly any other company does. They never ask for a receipt. As I said $350 Harmony they shut off on me before they sent another to prevent dishonesty. They have every right too if you want a replacement well out of warranty. Well, I guess their warranty is about forever. I am not sure if they can tell manufacture date by serial. Probably can but it could have sat on store shelf too. Nonetheless they are exceptional about warranty issues. Even if warranty may be well expired. Or they simply don't care. I doubt that, they are just a good company.
On a side note I now set my double click on notch 3. The standard middle notch is much too fast for my old fingers. Wheel did not spin as long as it used too but I just greased it. Now, greased lightening! It now spins twice as fast. This is a great mouse if unfortunately you cannot use a trackball for whatever reason. I have tried almost every top mouse. Maybe not enough buttons for MMO but I do not even game. Suits me fine. being smaller it fits my hand okay I guess but buttons on both sides are difficult to use. I manage anyways.
Did I say I love this?