FWIW, my initial impression (posted above) still stands after two weeks of having it in my main system. If you want thunderous, deep bass, look elsewhere. But this is a solid, feature-laden sub for someone on a strict budget.
I am satisfied with mine and it will not be going back. It will stay in my main system until I can build an Adire Audio DIY sub, at which point this one will go to the upstairs system.
I'm not recommending this sub for serious hobbyists, but for someone just starting out and/or looking for a stopgap sub that doesn't break the bank, it is nearly perfect. Also, the low price Costco has on it right now will nearly guarantee that the resale value of this sub will stay close to 80%-90% of the original purchase price.