I have tried the Ping and Medtronic. I believe if those two companies merged, then the best pump would be available. I liked the ping because of the remote, I hated the clip that came with mine, it was always falling off and breaking. I also thought there were too many button pushes to bolus and that too many steps were needed for site changes (I happened to lose the black cap that goes over the reservoir during a site change, I still have no idea if it got lost in the trash or down my kitchen sink - that's a scary thing that happens when you're rushing)
I like the Medtronic because it's more streamlined features for bolusing, easier to quick bolus, easier site changing although the new Revel has kind of changed my view on that as well but doesn't make too much of a difference. I really like how the CGM is integrated, but I miss the remote option.
Ultimately, the features are similar but if I was given the choice again I would go with the Revel, even if I didn't have the CGM. The pretty colors or LCD screen don't make me want to go back to the Ping, the function of MM is what brings me back. I don't need to call CS often, but I haven't had a problem with MMs CS. I think the best thing would be for your daughter to do a trial with whoever you guys are considering, that is the only way to figure out what features are best for her. Good luck!