I tried this formula once, and I didn't find that it performed the same as the real thing. Using this formula, the grain is larger than with real Microdol-X. Using the same times as for the Kodak product produced good negs, just not what I expected. This formula is very much like D23 with some salt added. Might as well just use D23 IMO.
See what others have to say, and then decide.