I have been following this project for a while, what is really impressive is that it's developed by a small bunch of developers with good advisory board and a small funding. It's true that Polygon is just a protocol to connect Ethereum with other blockchains while some would argue that other big projects are promising full interoperability and lot of other services.
However this project is concise but do deliver a product that works and has already a number of customers using it. ConSensys has already partnered with Polygon so this is delivering from both technical and business sides.