In the limited time I've used Ddrum Pro triggers, I've never had a problem either. One thing I did notice is how you mount them on the drum can have an effect. Our drummer was initially putting them on where the blue foam part was just resting on the drum head. This gave us mistriggers galore. We messed with it more and found that if you mount it so the foam is squished a bit, it keeps the piezo contact firmly against the drum head.
Our theory was that since it wasn't "forced" (albeit lightly) against the head and was just "resting" on it, the vibrations was in a way constantly hitting the piezo (making and then breaking contact) therefore causing the mistriggers. Don't know if that was the case, but squishing down the foam a bit solved our problem.
Also, this was for kick, snare and 4 toms. Worked for all of them. We also used 1 moongel per drum, but that was more a tonal preference to kill ring, not for better triggering. Although, their presence may have helped.