@Michel, pumping does not work well in scar tissue. If the scarring is very bad my pump gives a “No Delivery” alarm, and the BG is very high, It is impossible to see scarring on the skin surface, and I might place a set in a spot where everything seems to be ok. Then I start running high, and it gets worse later that day. I can bolus a couple of units, and the BG keeps rising. The insulin is having very little effect, so I move the set over a couple of inches. I don’t have to use a new set. The Sure-T sets are easy to move around.