I've been on a pump for about a year and a half and I love it. It has cut my A1C in half. I was doing up to six injections a day and now I only have to change the infusion set every 3-5 days. The pump works by injecting a short acting insulin in a basal rate (a few units every couple of hours, give or take, to be determined by your doctor) and a bolus rate that you control when you need to carb count. The easiest part of it is the bolus wizard, a feature that will calculate how many units you need to cover your blood glucose and what you are eating. It takes away any confusion, "Am I taking too little insulin? Too much?"
My only complaints about the pump are that it has to be worn all of the time (I take mine off to shower/bathe, and occasionally if I'm working out, etc) and while it's not really bulky, I usually carry it in my bra between my breasts, so when I wear a tight or lowcut top or a slinky dress it's hard to hide.
I'm surprised more CFers aren't pumping. It has completely changed management of my diabetes by simplifying everything.