Hey Boby, I use both FD and Olson blades. Of the FD blades, I use mostly the Ultra Reverse blades, but also use the polar blades for compound projects and New Sprials for portraits.
It's important to know that the UR blades are a lot more agresive than standard blades, but because of that, they leave a clean, smooth edge, and last about 50% longer than most blades. The UR blades do not come in 2/0, which I us a lot of. I have not had any luck cutting with any FD 2/0 blades, so I use Olson reverse tooth 2/0 blades, and when I want a less agresive blade, I use Olson Reverse Tooth blades.
When I teach classes at Woodcraft, I use Olson Skip Tooth blades, mainly because they are not too agresive and they are available at the store fo the students to buy.