Designed to break!

Products like this annoy me. It was obviously designed poorly on purpose. This would be a great product if they had made it about 2mm thicker which would allow a standard female RJ-45 ethernet jack to be the end.
Instead, they made a little flimsy plastic door ethernet jack which has 6 little plastic tabs which can easily break, and after any 2 break, makes the whole thing worthless. Even if you're careful with it, it's going to break fairly soon.

Thankfully I didn't buy mine. It came with a Tivo I had bought. It is compatible to use with the Tivo.

If you use the dongle or USB extension cable with it, then you can place the adapter on a surface where you can support the ethernet cable. That's probably the best way to extend it's life.