For what it's worth, here's my experience with house and garden's coco nutrients. Not a bad product really, you can easily do worse. I didn't stick with it because I couldn't justify the expense.

At least where I am the house and garden stuff costs the same as Advanced Nutrients, and the AN is just so much better that it didn't make sense not to use it.

But if you've just got the House and Garden sitting there you might as well use them up before you go buy some more nutrients. A bird in the hand is worth two in the bush, right?