I've had Medtronics pumps since 2008, first a 722 and now the newer 523 model.
1) The 523/ 723 also have the .025U/ hour basal rate "fine tuning". It's easy to get carried away with it but, the more I play with it, the more I agree that it's useful!
2) I run a lot and got this stuff, Opsite Flexfix Tape, to hold the CGM down and haven't had many problems (like 2?) since then, about 1700 miles (plus the times I forgot my Garmin, ran on the dreadmill, elliptical on my "off" days, bicycling, etc.) since spring of 2009, when I got the CGM. A few times, when it's really hot and humid out, I will take a lancet and lance the tape to drain the sweat out of the bottom of the "bubble" in which the sensor sits.
3) I agree with John that I like the Carelink software a lot, particularly w/ the CGM, it's been very easy to "step back" and see where issues are developing, not necessarily huge issues but little things to tweak for smoother control. I haven't used the Animas software though.
4) I've had great customer service from Medtronics too. I call them and the stuff gets shipped. Once/ year, I have to call them and wait for them to coordinate the doc and the insurance and all that but they have done well with that for me. I don't pay much attention to what it costs though.