See Melissa's post under the thread Possible Dilemma with Pump Supplies (scroll down, you will see it).
She gave some of the reasons it didnt work for her.
You have to be aware it requires you to throw everything out every few days, you cant go past three I dont believe.
And, the set is a straight in set, so it wont work for those of us who use angled sets.
Just think it through, as you should with any purchase.