Hi, I have had CFRD since I was five, insulin dependent since I was 11 and just recently (in the last month) started on an insulin pump. I have found it to be really convenient after we have found the right adjustment of basal and bolus rates. There were a lot of highs and lows the first couple of days, but that all evened out once we adjusted everything correctly.
I think what's most convenient about it is that I don't have to do any other insulin injections, just program the pump several times a day. The things I find inconvenient is that I always have a pager-sized pump to carry around. I started on the pump to prepare for pregnancy but am much more in control of my blood glucose now, so I am overall feeling better with more energy and my A1C has already dropped. There are definite links to better control over lung infections when your blood glucose is better, so that is a definite plus as well. Depending on what I am wearing, I either tuck it in my bra or in the pocket of my skirt/pants. There are lots of other places to wear them, though.
What specific questions do you have?