I like them and I use them. I know that they are unpopular and I know the reasons behind that as well. I don't know that I can necessarily say without a doubt that they are doing any good, but I like knowing that I am doing what I can to prolong the frame life without babying the pistol.
That being said, if you choose to install them, you need to be vigilant and prompt about replacing them when they begin to show signs of wear. If you fail to maintain and replace them properly, they could come apart in your pistol and induce malfunctions which is part of the reason that many people dislike them. Also realize that they actually shorten the travel of the action, which could potentially lead to problems in more finicky pistols. Also, I would only use them on a 5" Government model, but then again, that's all I have. Further shortening the travel can have a deleterious effect of shorter barreled guns, though I have not the faintest clue as to whether it would change anything in a longslide, I've simply never thought about it.
I would try to search online and find out some more about them, and opinions and reasons why some people use them and some people don't, and bear in mind the 1911 lasted quite a while before they came along.
HTH,
~Augee