I have a couple of their P223s, and an M223 Laser ranging scopes, all with BDC 600 reticles.
The Spot-On is what really makes these scopes tic.

I'm going to order their Slughunter BDC 200 for my Beowulf .50 cal.

I just wish they offered these exact scopes in 'first plane reticle' ....... but even in second plane, they are are great scope at a great price.

And Spot On is also an App that runs on both droid and iPhone/iPod Touch for $5.

P.S. Getting custom turrets from Nikon is also pretty easy.