Was able to find the 520 at a Walmart in Duarte, CA yesterday (4 left). For those calling around the UPC # on my receipt is 009785503569. As mentioned before, these remotes are locked up in cases with the Video Games etc.
I'm not so sure the regular Walmart folks will see the "value" in the 520 for $100.
Anyways, I'm coming from a 4 year old sony RM-VL900 which was on its last leg due to my fiesty 2 year old son, and the very first thing I noticed was the very small numbers as others have mentioned.
I have ReplayTV and the remote does a good job with the commands. I do wish however, that the Guide and Menu buttons were a bit more pronounced or set aside on their own from the middle. The Menu button is squished between the Info and Prev button and I've already missed it a few times and pressed the others. So I think that will take some getting use to.
On the software side, I had a bit of trouble setting the 520 up. While the software is very complete, it did take me a couple of shots screwing with the Input Modes for my Sony 34XBR2 and my devices. And everytime I would make a change, the software takes forever (3-4 minutes) to upload into the remote. I'm running a P4 3.0 with 1Gig RAM so i don't think the computer is slowing the remote down. This is my first Harmony device so I'm not too sure if other software setups take as long.
For you other Harmony 1st timers, I did find that moving through the software menus when making changes or tweaks was a bit cumbersome. For Instance, if you selected a device to make changes to, once you made the changes, the software didn't give you the option of going back to the top level of the software where the "update remote" button was located. It would kick you back to the page to choose which changes to make even though you just made them. The only selections available where BACK and NEXT. The next button would give you an error message to ask which changes you would like to make (I just did?) Back is the selection to make, although it didn't make sense to me ( I guess I was thinking too much of moving around in a web browser etc).
I also wish any button on the remote would activate the backlight on the remote. Sure, there's a GLOW button but any button would have been a nice feature.
Pretty nitpicky stuff, I just need to get use to the remote. But it does a very nice job of driving my ReplayTV, Sony TV, Sony Receiver, VCR, JVC DVD and my SA8000HD. Performs as advertised and it looks like the WAF might be pretty high with this one.
Now my 2 year old is another story.....I'm sure he'll break this thing in a week.
Sorry for the long winded review.