Yes, I also highly recommend at least to try it. Some time ago I tested many different developers mainly to check out, which one produces the finest grain. In the testing included was Ilford Perceptol (99% the same as Microdol-X). The big surprise for me back then was, that the best results in fine grain I´ve always had with A49 equal which film I tested. Maybe Ultrafin SF and Perceptol could match the A49´s results, I don´t remember this well, but Agfa Atomal F, another developer regarded as ultra fine grain, definitely was worse. And here comes the best and the next surprise. In terms of speed exploitation A49 was also one of the best. It offers box speed or even a little (1/3 stop) more with the films I tested (Tmax 100, Tmax 400 (old and shortly the new version), Tmax 3200, APX 25, Neopan 400, PanF+, FP4+, HP5+, all EFKE films, all FOMA films, Delta 3200).
I later found out that A49 uses a very special developing agent, CD-2, original a color developing agent, to make its features possible. Hydroquinone is the other agent. The formula seems to be be very similar to the Crawley FX 10 as described in the film developing cookbook on pages 68, 69 (1998 edition). At least the FX 10´s developing agents are included in A49. Crawley claims for FX 10 a 30% speed gain and believes that FX 9 and FX 10 provide the optimum exploitation in the grain / speed relationship. Downside is that sharpness is not the very best, but it isn´t with Microdol-X either. And with Microdol-X one shoots the film close to the half box speed.
If that sounds interesting to you, do a short comparison test between A49 and Microdol-X with your favourite film(s). I think it´s worth the little time spent. A49 comes from Germany and is, as far as I know, not well marketed worldwide. Therefore it is relatively unknown in regions outside of or not near to Germany. Its quality would justify that it is more common. My nickname is a little attempt to make it more popular, but I swear that I do not earn any buck if the sellings should rise.
Best,
Andreas