Yep, perhaps one of the nicer commercial brand/reasonable. I rarely support commercial brands however, because......they tend to be water, with a little tiny amount of fertilizer added.
Some folks get them, then reuse the bottle thereafter, same for ADA(pfertz are much cheaper).
KNO3, KH2PO4, GH booster, trace mixes, are very cheap dry. Unbeatably cheap. You also do not pay for shipping water, more plastic etc.
For some, the argument is that they do not wanna mess with KNO3 etc, scared of chemistry, claim it's harder, just wanna add a couple of 3 things and be done with it.
Poor observation, care and trying to get around the basics is questionable at best I think. Some chem is good and it can save you a lot of $ to learn a few simple things.
Even there, a dosing calculator makes quick work of the chem. So there's really not much argument other than hobbyists newbie ignorance. Sorry, I do have a tough time supporting that part.
Regards,
Tom Barr