I've recently been spending a lot on increasing my L lens collection. I'm kind of glad that this wasn't my first purchase because the standard would be set very high. With most L's you are paying for premium glass, however, there are still some that are better than others. This stands at the top of the class. Super fast AF, colors are beautiful, lens is extremely sharp, and of course the macro feature. I tend to love IS on anything above 50mm. While I do have the 135L; that is also a great lens, I find that this one suites my needs better, and the 135 lacks IS. Canon and Tamron make some great macro lenses. I also have Canon's 35mm macro that is tact sharp if you are looking for something wider.