I just had some Lenz decoders put in some locos and WOW! The momentum (BEMF) is built into the chip from the getgo and it is sooooooo sweet! I have TCS and Digitrax decoders in other locos that need lots of tweaks or diddling with CVs and all that confusion to get anywhere close to the built-in qualities of the Lenz. Yes, I know it's easy as pie for you techno DCC wizards but I'm not one of those. I was thinking of getting an Atlas DCC/Sound S-2 but if I have to spend hours figuring out and setting Cvs, I'll get the nonDCC.