Short answer: It depends on the Mormon. The Church has no official view on other organizations except for what is contained in the eleventh Article of Faith:
"We claim the privilege of worshiping Almighty God according to the
dictates of our own conscience, and allow all men the same privilege,
let them worship how, where, or what they may."
I was an LDS missionary in Philadelphia where they have a very large Masonic Temple. I had the opportunity to visit the temple and take a tour with a group of fellow missionaries, it was curious to see how the free-masons took a special interest to us visiting them. I learned many things from the Elders I was serving with and the Masons I met in the temple that day.
The rumor I was told is that Freemasonry dates back to the construction of Solomon's temple, the masons were exactly as their name suggests, they were Masons, stone setters, they built Solomons temple. Supposedly, during construction, the masons built secret passageways in the temple, which they later used to spy on the ceremonies. Those sacred ceremonies were preserved in part by the masons, and it was they to whom Joseph Smith was commanded to go to recover those ancient ceremonies and rituals.
Joseph Smith was a very prominent Mason in Pennsylvania, the temple museum had a second edition Book of Mormon gifted to them by Joseph Smith himself, apparently he was a Mason of the highest level, and achieved such a level in an unusually short period of time, supposedly because of the divine instruction he was receiving about temple ceremonies the same time he was learning from the Masons.
The Masons I met were eager to talk to us, and took delight in commenting on how Masons and Mormons share many similarities. It's my opinion that some Masons consider Mormonsim to be a schism of Masonry.
I met several members of the church down there that were also masons. One of the most intelligent High Priests of the church I have ever met, who taught me a great deal about the 'evolution' of the bible, was himself a level 32 mason.
To be frank, the church doesn't really take positions on organizations of men, or other churches for that matter. That was one thing that was very foreign to me when I was a missionary, was how much other religions were taught about Mormons by their pastors, or in seminars, or retreats. Whereas I knew nothing about the other sects of christianity or how they worshipped different to us. In my 20 years of active church going, all I had been taught were the doctrines of Christ and the teachings of the prophets, other churches and organizations are simply not discussed as lesson material in LDS churches.