Product review (5 stars): it was a good deal.
This pump/filter chamber replaced the original one perfectly, although the pump portion has been updated somewhat from the original one (hopefully for the better).  It took a full week for this item to arrive, and when it did, it had no packing list, instructions, or any kind of paperwork with it.  It installed in about 5 minutes with no complications and has been working perfectly.  For the price, it was a good deal.