Jim,
I've used the Chris Lilly rub and injection on my butts every time, but the last time. I used his rub and was lazy, so I skipped the injection. I won't skip this again because the pork wasn't as flavorful, nor was it as moist. I'm sure it could have easily been the pork or some other factor, but everything else was a close to being the same as it usually is.
I love this rub for the bark formation and for the flavor it produces. I've used a handful of other rubs, but I always come back to this one when I'm not going for spicy heat.