I have the black Blur in my pocket right now and have been using it on and off for a couple of years. The coating on the blade is almost fully there. There a small section, that is like a 2 mm diameter circle of the coating missing about 30 mm down the blade, but that is not too bad considering what I put it through. I would have preferred the non coated blade, but I got this knife for $26, so I am not complaining.
I prefer the angled thumb stud openers on the Blur over most other thumb studs. They hold nicely to the thumb or finger and easily opens the knife. For the size of the blade it opens fairly well. Many other brands of AO blades about rip themselves out of your hands, especially on the larger knives. It is not as nice as say the Kershaw Leek, but that is a much smaller knife.
The ergonomics work well. It is not shaped perfectly for say the hammer grip hold but for other methods to hold it fits my hands nicely for my modestly large size hands. Those side gripping panels are less painful nowadays, especially when you put your hands in your pocket. The older style would wreck your hands if you weren't careful. This one is just mildly uncomfortable if you have a tight pair of jeans on and need to get into the pocket. At least it will not tear up a pair of slacks anymore.
I used my Blur for everything from gardening to cut vegetables from vines, cut back branches. string, packaging, wire coating, tape, plastic coating and many other tasks. In fact I just opened the boxes and packaging for 20 oscilloscopes and frequency generators and then broke down the boxes.
Oh and as others have said they stopped making the blades of 440A back in August 07.