I have one, it seems to be a clone of the Rousseu (spelling) plate.
The are two issues I've had with it.
First, the four little leveling screws fell out of the four corners so now I shim it with blue tape to make sure it is flush to my router table's cut-out. Not a big deal, I could just find some slightly larger set-screws and replace them. Just haven't done it.
The second issue my particular one has is the smaller inner ring sets just a smidgeon low on one side. This causes a tiny lip that material can catch as it passes the bit. If I remember to check it and pop the ring, rotate 1/3 turn and snap it back the problem goes away.
For $20 it seems to be a pretty decent little plate. I've occasionally left the router hanging from it for several days at a time and so far, no problem. Not a habit to get into, better to remove the router and store it out of the table with these less expensive phenolic plates.