I have several Bachmann steamers that came with Soundtraxx sound installed,and these are very good. But when I decided to add sound to my four spetrum dcc ready connies, I chose to use TCS wowsound decoders with the keepalive feature. They have great sound and motor control, and with the keepalive feature power interruptions and stalls are eliminated. Soundtraxx offers a better variety of sound selections, and if they had the keepalive feature I would have used Soundtraxx. Some of my Easytrack is Steel Alloy, more difficult to maintain than Nickel Silver.