Yes, many times. I grew up with Mormons; played with them, went to school with them, dated them, worked with (and for) them. I've still got a really nice BoM with my name embossed in gold on the front cover -- a gift from a Mormon employer.
As a work of fiction it is interesting and very imaginative. I like reading it despite its flaws.
However I can't take it seriously and have a hard time understanding why anyone else would.
Even to an atheist, the Bible holds a certain degree of historical value inasmuch as it describes real peoples and real civilizations. For example, there is absolutely no doubt that the Egyptians, Israelites, Greeks, Persians, Romans, etc. existed. You can actually see (And sometimes even touch) Egyptian artifacts that were already ancient at the time of Christ.
You can travel to the Holy Land if you want. You can see the Wailing Wall. You can see the Mount of Olives. You can see the house of Caiaphas. You can see Hezekiah's tunnel. You can see the pool of Siloam These things really existed and you can see and touch the proof.
The Book of Mormon describes a civilization technologically on par with the Ancient Greeks and Romans, but there is not a shred of evidence that such a civilization ever existed, which is a huge problem because Iron age civilizations create durable objects that last for many thousands of years.
For example, how many durable objects do you see depicted here?
(The prophet Abinidi before King Noah)
I see iron chains, leg irons and manacles, steel swords, cut jewels, gold ornaments, cut stone, mosaic tile, helmets, breastplates, bucklers, and grieves just to name a few.
Mosaic tile alone is almost indestructable once it has been fired. It doesn't rust, disolve, or corrode. It is impervious to solvents. It can't be melted down. Breaking it only makes smaller fragments that are more easily lost (And rediscovered later) which is why we have so many mosaic artifacts from the Greek and Roman civilizations today.
One of the most naive things about JW depictions of cozy little shingled, gabled, lapsided, dormered houses tastfully situated in front of a clear mountain lake in a future paradise is that even the simplest of manufactured items sits on top of a large pyramid of technology. A pencil is one of the simplest of tools, but could you make one from scratch? Even the basic tools to build a log cabin (An axe, a saw and a bracebit) are the product of foundaries and smelting furnaces. It takes tools to make tools. It takes tools to make the tools that make tools (And on and on.)
The picture above is similarly naive because what you don't see in pictures that (Mormon) artists have painted to capture what the Book of Mormon describes is the pyramid of technology it would have taken to support that level of civilization. This also would have create many artifacts that cannot and would not disappear without a trace.
This is just the tip of the iceberg. IMO In the BoM, Lehi and his family come to North America shortly before Jerusalem fell to the Babylonians. This was many centuries before Alexander the Great conquered the Holy Land and the Jews started speaking Greek. Therefore you should find ZERO Greek influence in the BoM. Any Greek influence at all would be anachronistic
But that's easier said than done. The influence of the Greek language absolutely permeates the NT. If someone were to borrow words and expressions from the NT with no knowledge of Greek, it would be very, very easy to inadvertently introduce Greek expressions into a composition without realizing it.
For example, one of John's pet expressions was "αμην αμην λεγω υμιν"
If you translate it absolutely literally it comes out "Verily, verily I say to YOU" It this case, a dead, literal translation is not the best because this expression is idiomatic. Semantically it actually means, "I tell you the truth" or "Truly I tell you."
But a poor farm boy who only had the AV to read (i.e Joseph Smith) wouldn't know that would he? He might come to the incorrect conclusion that "Verily verily I say unto thee" was a normal way that ancient people spoke and not realize that it is simply a poor translation of a Greek idiom peculiar to John:
"Verily verily I say unto you, that this is my doctrine...." (3 Nephi 11:35)
"Verily verily I say unto you, that whosoever shall put away his wife...." (3 Nephi 12:32)
"And verily verily I say unto you, that I have other sheep which are not of this land..." (3 Nephi 16:1)
Greek idioms should not be in the Book of Mormon. The word "synagogue" should not be in the Book of Mormon. Their presence is a dead giveaway that Joseph Smith was simply aping the NT.
If this sounds too complicated, just ask yourself, "Why is the Book of Mormon written in Jamesian English at all? Is that really how people spoke in America in the late 1820's and 1830's?