I have used a Minimed 512, and now have an Animas 2020. My experience with MiniMed was not good. I was given the 512 by a co-worker, in it’s box, unopened. Her son had struggled with Type 1 for 25 years, and was going to go on the pump to try to get it under control. Before that happened he lapsed into renal failure and died, never having used the pump. When I tried to contact MiniMed to start getting supplies for it, they told me I had to pay them $500, and get a letter from my co-worker verifying that she had donated the pump to me before they would sell me supplies! A little money hungry I think. They finally agree to sell me supplies because the son had never registered as the owner, making it complicated to transfer ownership to me. After about 5 months the pump developed software problems, it would lose all of it’s settings (date, time, insulin sensitivity settings, basal rates, I mean all of them.)when I changed the battery (which you have to do about every 3 weeks). When I called MiniMed to try to find out what was going on they told me that it was a software glitch, that the only thing I could do is pay them $500 for a refurbished 512, and a 6 month warranty. ($500 seems to be the magic number.) Needless to say I decided to get a new pump from someone else, so I got the Animas 2020. They have been great to work with, and I like that this pump is water proof, (the 512 is not) and has a food dictionary programmed into it. (In most other respects it has a lot of the same functions as the 512. To be fair, the 512 has a meter that automatically sends your BG readings to the pump, which is nice, and has FDA approval for a BG sensor.)
Sorry, I kind of got on a rag, but it was very a frustrating experience for a first time pump user!