I've had my 630G since September of last year (upgrade from a Medtronic 523 pump) and AFAIK it's a major upgrade improvement in many areas, including color display, CGM/Enlite accuracy and graphical display output, waterproofness, etc. The 523 didn't have wireless integration with a BS meter either which is also a big improvement with the 630G over what I had before. CGM accuracy is great so long as I use an interstitial fluid happy area which for me is upper buttocks area since I'm lean and have scar tissue in my abdomen area due to many years of needle and pump infusion set abuse. I've been on insulin pumps over 30 years since Minimed 504 pump days - with bent needles infusion sets that stayed in!
Looking forward to getting a free upgrade to the 670G system when it becomes available in the spring!