I have used a strap pad and I didn't like it. FYI it's not for using to get off lifts (and it actually makes it harder because you don't have the freedom with your right foot). Its primary function is to use it as alleviation on the lift hill to keep your legs from wearing out as much. It doesn't work very well for that either because the weight of the board doesn't balance evenly between your binding leg and your strappad leg, plus the strap just creates a pressure point on your foot. I actually found that using the strap pad hurt my right foot more than my left foot that was actually in the binding.
Also, the strap pad isn't as good for using it as a normal stomp pad, because the combination of snow buildup and the strap itself means there isn't much "grip area" on the pad. I was disappionted with its performance and it also makes you look like a dork/noob on the hill, so just skip it.