There was a thread the other day about people buying these out and scalping them. Walmart has restocked them again (as they do weekly for the most part). So if you are looking for what is easily the best value for a 4K Android TV box with a good remote, you can purchase them again.
I just picked one up a couple of days ago, it is actually quite good and snappy. Works similar to my Tivo, though seems a bit quicker. I have tried quite a few apps (Netflix, HBOMax, Disney+, Prime, BritBox) and have had zero issues with it so far. It might not be supported in the future, but it is running Android 10 now so it should last a while, and I did not see the benefit of the $50 Google one over this.
I am not running 4k though as I don't have one yet, so maybe that will make a difference - I hope it will not.