My dock came in today, and overall, it seems to be a decent add-on. I don't have that other popular third-party one to compare it to, but I'm sure either would be fine. Valve wasn't kidding when they mentioned being able to update the firmware on the dock. As soon as I turned on the screen for the Deck, I got a notification about there being an update for the Dock. You just hit the button to update, and it updates it right there for you. The only thing is that I don't recall there being any information on what the update does, which would be nice to see. I'm also not sure if there's a section in the settings for the Dock information as I didn't see anything. I'm also using the power adapter that I was using with my Anker hub and not the one that came with the Dock.
All in all, if you've already got an Anker USB hub or something like that, you don't really need the upgrade, but I do prefer it leaning up rather than constantly laying down like I had it with the previous hub.