I have the USM version of this lens. For the price, it is great. But it shouldn't be compared to "L" glass. It is much more comparable to rebel "kit" lenses. Maybe even the older Rebel Kit lenses. I upgraded to the 100-400 L soon after buying my 7D. I have played with the two at 300 mm and the 75-300 mm is considerably softer and spends a significant amount of time focus hunting. Build quality isn't comparable. Bryan has a review up for the USM version and it is pretty fair. You can take pictures, good pictures, with the 75-300 (USM), but expect some softness and don't expect to be able to do much cropping.

Bryan's review:http://www.the-digital-picture.com/R...ns-Review.aspx

BTW. I don't see the non-USM version on Canon USA's website. Which makes me think it isn't even current and may not be as good as the USM version.

Honestly, if you need the reach, think about spending some more money on the 75-300 IS version, which is supposed to be sharper or the 70-200 f/4 non-IS.