The value of having the CFA qualification depends on what you plan to do with it.
If you join a buy-side money management firm in an investment capacity then they will, most likely, require you to complete the CFA. The reason that they require their staff to do this is so they can tell their investors that most, or perhaps all, of their investment staff has the CFA. Having the qualification gives you more credibility when you are managing other people's money. Of course, the firm would pay for the fees associated with the exam, study materials, etc., and would probably give you some time off from work so you could study for the test. They might even pay for a CFA review course (which can be quite expensive.)
An MFE classmate of mine who, upon graduation several years ago, joined a major fixed-income investment management firm in California experienced everything I have described above. His remark was that the CFA material itself is not difficult; the hard part is the sheer volume of material (much of it "very boring") that you need to memorize for each exam. Note that just passing the exams doesn't automatically permit you to call yourself a CFA -- there is also a requirement of 4 years of relevant working experience before they will grant you the CFA charter. My friend finished all the exams in 2009 but just received his CFA charter a week ago because of this work requirement.
If you work for a sell-side firm then having the CFA is much less important, unless you go into a research analyst role, where you are publishing reports on various companies, etc., in which case it is a useful qualification to have. Publishing investment research as "John Q. Analyst, CFA" gives you a bit more credibility (at least, among those customers of your firm who are going to be reading that research) than simply "John Q. Analyst". Note that I am not referring to "quantitative" research. Rather, research which recommends that customers buy (or not buy) shares in some company for fundamental reasons.
If your plan is to join a quantitative hedge fund or a proprietary trading team then I don't think that anyone would care that you have the CFA, though as Yike Lu pointed out above, the knowledge that you would gain while studying the material could be helpful in job interviews. However, most of the material has little bearing on what you would study in an MFE program. Rather, much of the CFA material would be covered in a (non-quantitative) finance or accounting program.
If your plan is to become a risk manager then a qualification such as the FRM is far more relevant than the CFA.
Of course if you do manage to pass all three CFA exams by the time you graduate, congratulations!
It may help with your employment prospects -- but you'll have to work in the industry for 4 years before you can call yourself a CFA!