Product review (4 stars): Good value for the money
Not super heavy duty construction but for the money I feel this bag is a good value.  The pannier extensions appear a bit larger in some photos than they are in person.  They measure about 11-12" from the top of the bag to the bottom of the pannier.  They are juuust long enough to hold a Kryptonite Evolution long shank U-lock and have room for the 4' or so cable that goes along with it.  The u-lock wouldn't fit in the main compartment however.

The interior movable divider is handy (like a camera bag) and the several interior pockets are handy as well.

I think the Topeak bags are heavier construction but they are a heck of a lot more money.  For day riding that I intended this is a good bag.