I have 2 daughters that use the T-slim. A 17 year old and a 14 year old. they've had it for a little more than a year and a half. They use to use the medtronics for over 6 years. We've been pumping for a long time. The girls LOVE their T-slim. They tell me "it's cool...like an iPhone" The only con I see is that it doesn't pair with any CGM that is on the market today. If you are getting a CGM, then we found the Dex4 works well, but you would need to carry around a separate device to see the readings.