I've used pretty much all the HPW type products starting with the EN kit, which was ok, my gliders did fine with it. Then I had to travel so I purchased the Critter Complete (then HPW Complete name), due to living arrangements, it was the best, easiest to used and my gliders did well with it also. I did end up getting Critter Plus (then HPW Plus name), that is the same mix and storage as the Original HPW which was the diet originally created by Peggy Brewer the same who manufactures/sells the Critter Love Complete and Plus.
After I was ready to move back across country again, I figured to save some money I would try the EN Instant HPW. This has been okay, it was thicker than any of the other HPW type nectar, so I emailed them about diluting it using less powder (and the amount I wanted to use) and they said it was okay to do so.
My gliders did okay with that too, but I'm not entirely comfortable considering I was wanting to dilute it and the company said it's okay, because then it makes me wonder if they suggest using more powder than actually needed to use up the product faster. I'm not saying this is the case, just my type of logic tends to wonder about things.
I ended up ordering the Critter Plus, I will use that and when I can I may switch back to the Critter Complete, because it was so nice being able to make it up either in a batch or single serving nights. Also, I found since using the EN Instant, I could just use my little Cooks mixer (same as Bullet), and I know that the Complete I should be able to as well. This is much more convenient as well for me than getting the blender out, lol. Not that I'm lazy, but I do prefer to spend less time in the kitchen.
I'm choosing the Critter Love Brand over the EN brand because I feel it is better quality and I trust the maker of that brand more than I trust EN. I'm not saying EN is bad, I just know that Peggy has developed these diets after extensive research and consultations with veterinarians as well as other experts, I'm not sure of how EN products came to being, I'm sure through research, but Peggy created the OHPW diet formula.