I have the earthx an no issues with a couple thousand miles using it. It cranks up and before the Emil gas system I had to crank a bit more than normal and the battery never let me down. The banner always scared me during my longer cranking sessions. I have killed the battery a couple times (ie left the key and the ignition on) and each time the battery recharged with no problem. The battery size is smaller but it fit in with no customizations on my part. They are amazingly light.
