Any $500 sub will be riddled with compromises. Imho quality of connectors is the last thing which I could care about sub in this price range. Imo they should've skipped piano finish and go with 10" driver and more powerful amp.
As this products stands now - there could be a market for this, but I don't see myself recommending it over SVS PB1000 or HSU's VTF-1 mk3