It certainly is a bargain at $.05 per load, but the score for it at Consumer Reports is very low. It received an overall score of 34, with cleaning ability rated at only Fair. CR found it not able to remove grass, blood, or dust sebum (ring around the collar) from their test load.
If you have softened water, your results may be better. CR tests in relatively hard water. As Launderess said, it is probably fine for lightly-soiled loads, or if you pretreat stains. Not every load requires a "big guns" detergent.
For the sake of comparison, Wisk Deep Clean (liquid) scored an 80, was rated Very Good for cleaning ability, and was very good at removing the three aforementioned stains for $.14 per load.
The top-scoring detergent, Tide With Bleach HE (powder) scored an 82, was rated Excellent for cleaning ability, and excellent at removing stains for $.22 per load.