I placed a pre order for the 2400. Given a long career in the analytical instrument industry I can't resist acquiring , or at least trying new technology in rangefinders. The 2400 certainly looks appealing, but I do have some reservations about the AB ballistics software(IOS). I'm not a fan of the aerodynamic jump software in the AB Ballistic program and find that I have to make sure I have a zero values entered for wind to get the elevation outputs to match my very proven outputs and long range results when using Shooter/Terrapin/Kestral or my Gunwerks G7, neither of which have algorithms for aerodynamic jump. While I can live with this work around, it would be nice to be able to turn it off like you can with SD and CE. While I fully understand the theory behind aerodynamic jump and how it can effect the bullets flight path, I think there are too many variables, and the softwares correction values as it effects elevation can overcompensate, producing a miss. Just me, but I would prefer to deal with it myself for my hunting/shooting needs. I generally deal with wind corrections independent of any Ballistic program anyway. All said, I'm anticipating the advantages of the 2400 outweigh this concern and potential workarounds.