In my opinion, all the devices that exist in diabetes land work. It's based on personal preference and how your body adapts to it. I also think it's in your mindset. When I was originally going on the pump, I just thought the Omnipod PDM was more attractive and didn't really listen to the MM lady. Two years later, I was ditching Omnipod for the MM pump and love it. It hasn't been perfect and I've learned some tricks being on this website. Other diabetics are your best friend because we all learn ways around the built in systems these companies have. I just started on the CGM recently and haven't had any issues at all. It is fairly accurate and hasn't given me any issues. They're also coming out with a newer version that inserts differently and is a bit smaller which might help the inaccuracy issues. I love that it yells at me but I also know that I need to rely on my blood glucose meter always. No CGM is spot on accurate and they all have a bit of a delay.
My advice: no matter which one you get, I'm sure there will be something that comes up. It's inevitable. My BEST idea was joining this site and finding other's suggestions. No matter what the technology that you decide to use.
I started with a MM pump but for some strange reason, my ENDO wouldn't write a script for MM. I wound up with an Animas which I really dislike. My Endo is now an ex-endo! I can't wait to get back to MM which I really liked and probably still will.
But the CGM device is a different matter. As far as I can tell, the Dexcom (which I have been using for a few years) works well and can be used for seven days. The MM CGM is restricted to three days (I don't know why). Have you looked into the cost of one vs the other in the long run? I am thinking the MM pump and the DEXCOM CGM would be the best choice for me. Your opinion??