First of all, I do not have a HE machine and this worked fine. I used it for diaper laundry, so I didn't use a whole lot of it. A little bit goes a long way. I love that it is unscented and after doing the diaper laundry with Planet 4 or 5 times and line drying we didn't have any problems with ammonia build up or other stinky issues. I will be keeping a bottle of Planet on hand from now on and I'm pretty sure I will start using it on our regular laundry. One other thing to note is that their 50 oz bottle of 2x He detergent will do the same amount of loads as their 100 oz bottle of their ultra liquid detergent.
Here are a few other things you'll want to know about Planet. All of their products are hypoallergenic, biodegradable, not tested on animals, free of animal ingredients, unscented, phosphate free, and non-toxic to aquatic life. There are many other benefits to Planet products and I suggest that you take a moment to visit their website and read about them and their products.
I was not compensated for this review in any way other than receiving free samples of detergent to try. This review reflects my own honest opinions and I hope you find it helpful.