I have been using Humbolt's Grow, Bloom, Deuce Deuce, and Honey since January. And to be perfectly honest... they were a huge pain in the ass for me.
I got decent results with them, but in order to unlock all of the Nutes in the water you have to brew them together for at least 24 hours. I was just using 1gal milk jugs for mixing and I was having to go in and shake the jugs at least 10-15 times during the 24 hour period. Then when I went to use the nutes on my plants there was always powdery stuff left behind.
Not to mention that after mixing the nutes in a jug, they would stink like horse shit and looked like chocolate milk lol..
I recently swithced to Foxfarm Tiger bloom, Big Bloom, and Big Grow. And have had awesome results so far.