Pros: Loud and deep for a 10" sub, little to no distortion, cheap.
Cons: None yet.
I just bought one of these for about $30 and have it in a small $30 Walmart sealed box. With this sub powered by a 200 watt Optimus amp it really makes my 89 accord shake. For bass lovers on a tight budget I would get two of these in an angled sealed box with a 300 watt amp. My friend bought the same two and has them in a bandpass box with about 150 watt rms to each and you can hear him coming from down the road. I think for the money they sound good, but if you want a great performing sub I would go with something else. I would say they are good, but not great (but great for the price).