FWIW, I've used this formula with variable results. It sometimes works quite well, yielding good density and color. Sometimes, though, it produces poor results -- most often taking the form of thin (low-density) negatives. I haven't figured out exactly what the problem is, although I think it's at least partly a matter of the brand and type of film. (The two worst rolls I ever pulled from the tank when using this developer were both Ilford XP2 Super. Fuji and Ferrania films usually seem to do well.) This is a pity, really, since the (claimed) long shelf life and 75F operation are both great features. Elsewhere on APUG, Photo Engineer has posted reasons why divided developers may not work optimally when emulsions change, so perhaps it's not surprising that a developer designed for the films of over a decade ago isn't working well with today's films.