See, here's the thing. Wilson has a pretty good marketing campaign going. They've got half the country convinced, it seems, that they make the world's only reliable 1911 magazine. So they sell them at $25 to $30 a pop, and tell people "it's worth it if you bet your life on your gun". People buy 1911s, practically throw away the factory mags that come with it, and buy the Wilsons. Pretty good racket they got going.
However, considering that all the companies out there seem to be quite capable of making functional magazines for all the other guns, I don't really believe that Wilsons are the only ones that work. Will I buy a couple? Probably. But I like to have a LOT of magazines for my weapons (for nothing else, it makes range trips more convenient). A lot of wilson magazines would run into the hundreds of dollars, and it simply isn't worth it if a CMC or Metalform, or even a GI magazine, works just as well.
Besides, it seems to me that people were depending on 1911s for self defense long before anyone had ever heard of Wilson Combat.
Now, if their mags were truly the only ones worth anything, then yeah, I'd go for it.