Hirhurim just had a post about this topic, where he discussed some reasons that people should follow the aruch haShulchan. Yet in many circles, people just follow the Mishna Berura and rarely even ...
The Aruch Hashulchan is written on the whole Shulchan Aruch, and even has sections on Halacha that is not currently applicable (Aruch Hashulchan Ha'asid). Yet he never finished Even Haezer. Why?