One of my Mori writes as follows:

"Frankly, I think that the truth is that if you do not grasp the Torah whole, you do not grasp it at all. If you read ONLY Humash in the written Torah or only Sh"`A in the Oral Torah, you have simply not grasped it at all! NOT AT ALL! That is the biggest problem with Sh"`A. (Not the only problem, but the biggest). This is not so with the Mishneh Torah. If you think small, you do not think Torah. The classical Trivial. Here is an example: A couple years ago, a young yeshivah student came to visit me - with a friend of mine who brought him. He asked why M"T? I answered because ONLY M"T is whole. So he asked, what do I care about meal offerings (menaHot)? I said, NO ONE who knows that a kohen must take a handful of the meal offering with a minimum quantity of 2 olive sizes would say that an olive size is 30 grams or the size of a match box, as your teachers have taught you, because they do not know the Torah as a whole. He had no answer to that, because there is none. It is sad that he had never learned by a Torah scholar who knew the real WHOLE Torah. And even those who have "read" M"T, without the intention of living by it, do not see what is there, for learning is only real if you do it - to live it. By the way, have you EVER in your life seen a kohen whose fistful is as big as two matchboxes? And of course the size of an olive is NOT a weight, but a volume. The amount of gross ignorance by people who learn and teach in the Sh"`A context is astounding! Contrast our Mori who said that a kazzayit is the volume of an olive. TRIVIAL but true. @:-D"

About accuracy, he said:

"Oh, I do not mean to suggest that within its narrow scope that the Sh"`A is even CLOSE to the RMBM on accuracy, because it simply is not.  It is full of compromise and latter-day-saint customs that are against the Talmud."

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On a side note, many people today do not even do what the SH"A says - in the first place. If they did, we would all have a lot more in common.

The objection is often raised that "we don't posken like the Rambam". It is true that most Jews (TODAY) do not live according to RaMbaM's record of pisqei-halachah. However, it is also true that they do not live according to the Shulchan-Aruch, which most do claim to adhere to. The author of the Shulchan-Aruch himself, in his book of responsa "Avqat-Rochel" #32, in response to one who asks whether or not we must force communities who "go by the Rambam" to go instead by the Shulchan-Aruch, writes:

"The answer is, who is he whose heart dares to go force communities who hold by the Rambam z"l, to go by any one of the posqim, Rishonim and Aharonim?!? As it says in chapter Quf in `Eruvin: "The law is forever like Beit Hillel. And whoever wants to practice like Beit Shamai, let him do so. By the leniencies of B"Sh and the leniencies of B"H, and by the stringencies of B"Sh and the stringencies of B"H? About such a person, Scripture says: "the fool walks in darkness." Rather: if like B"Sh, (one must practice) according to with their leniencies and their stringencies; if like B"H, (one must practice) according to their leniencies and their stringencies." Isn't it even more so: If (they said this) regarding B"Sh and the halachah does not go according to them, and they said "if like B"Sh, (one must practice) according to their leniencies and their stringencies"? Now the Rambam, is the greatest of all the legal authorities, and all the communities of Erets Yisrael and the Arab-controlled lands and the West practice according to his word, and accepted him upon themselves as their Chief Rabbi; why pressure them to budge from him?"