eero Pro Mesh WiFi Router

This is an update on the replacement that I received. The same problem as with the original one, except that whereas the original one would just silently drop its speed down to 100 meg, this one fails and its light turns red, and after a manual reset, its new speed is 100 meg. The Eero tech support spent one hour testing remotely my first refurbished device and concluded that there was something wrong with the ports of that device. But they also told me that the warranty on that device had expired long ago. So, they told me to use my Amazon return period to get a new replacement, which I did. So: 1- BUYER BEWARE: The Amazon claim that these refurbished like new devices are covered by the same warranty as the new devices is FACTUALLY INCORRECT (well. at least it was/is factually incorrect in the case of that particular device)! Good luck getting yourself in the middle of resolving the conflicting claims of warranty coverage and expired warranty between Amazon and Eero if you buy one of these refurbished devices and it fails after your Amazon return period. 2- BUYER BEWARE: Both the first and the replacement devices start at 1 gig cable connection speed, and after a while (ranging from a few minutes to a few of hours) their speed drops to 100 meg. It is a bit strange for two refurbished devices to fail the same way. It may be the case that such behavior is inherent in the design of these devices, i.e., a new one would behave the same way too. 3- BUYER BEWARE: Although these devices are supposed to support 1 gig cable connection speeds on both ports, neither device gave me more more than 500 meg on the second port during the short time while the other port's connection speed was in fact 1 gig. Again, I suspect that such behavior is inherent in the design of these devices, i.e., a new one would behave the same way too. My setup consists of three Eero Pro 6e devices that work perfectly well. It may be the case that in fact (the claim and testing of the Eero tech support notwithstanding) both devices that I tried worked exactly as they should have and: 4- BUYER BEWARE: Issues 2 and 3 above may arise from the fact that in spite of claims of compatibility, adding an Eero pro to a mesh of Eero Pro 6e does not actually work as expected (i.e., the speed of the Eero pro drops to 100 meg). I immediately returned the replacement unit for a full refund. 5- BUYER BEWARE: If you are considering this product, make sure you test the device as much as you can before its Amazon return period expires. Unless, that is, you wish to navigate the claims and counter claims of "new device warranty coverage" between Amazon and Eero if you run into trouble later.