The CF154 Blur is my favorite knife, and the only one I carry now. I'm a big pusher of it, and I recommend it to everyone. I bought three of them because I like it so much. I also have the S30V Blur, and between the two I love the CPM-154 much better. It has to be my favorite steel. I loved it on paper, because I always loved 154CM (thanks to all the Leatherman Charge ALs I've been through and still use) and the change to a powdered steel seemed like something very cool. Having used this knife since November it lived up to my expectations, and has been great to use.
I used the factory edge for about a week, and it worked great. It was a bit uneven, but that's not a problem for me. I decided to reprofile it on my Edge Pro, and brought an already low angle (for most parts of the bevel, it was from 17-18 degrees per side) down to 16.5 degrees per side. It cut fantastically, and I was in heaven. It was very easy to do, and didn't put up a fight at all. It didn't murder my stones like Elmax does, and didn't take as long as S30V often does, particularly in the Blur. It was just easy to work with.
I use my knife at work to remove the shielding from CAT5/6 cables, some light wire stripping, opening cases and boxes, cutting duct tape and straps, and whatever else one would normally use a pocket knife for. The edge held for a good amount of time, and all I did was strop it every other night most of the time. Just using the strop, I maintained the edge at a phone book paper slicing sharpness until the end of January. It was still sharp, but it snagged a lot on the phone book paper. I gave it about 8-10 swipes on the fine stones of a Sharpmaker (20 degree setting), and it was back to popping hairs off my leg and gliding through phone book paper. Since then, I've just been stropping it, and gave it another two swipes on the fine stones two nights ago after some rather extended use destroying an array of coffee-soaked file boxes.
I haven't much experience with D2, so I can't comment on it. However as a steel for you to use in an every day pocket knife, CPM-154 is a dream. So easy to sharpen and maintain, yet quite robust in how it handles. I had my Blur's blade tested at my university, and it came up at 60.2 HRC. That is, as far as I understand, a good place for this steel, and not too soft to take advantage of the added toughness that the CPM process added to the 154 mixture.
So far, nothing has taken my attention away from this knife for any kind of practical use.