I'm just about to receive my third Insight pump in just over 2.5yrs. Pump 1 lasted from Jan 16 to May 17 - about 16 months (fault was it would not accept a new cartridge - I was away on holiday) Pump 2 lasted from May 17 to Sept 18 - about 16 months (fault was it would intermittently refuse to manually unlock but after maybe 5-10 mins or by programming via handset or removing cartridge it would recover). Pump 3 due Sept 18 to date unknown, but lay odds it needs replacing by Jan 19. So by the time my warranty expires and my pump needs replacing by the NHS in Jan 20 its likely I will have had 4 pumps in 4 years. Other than the two items above I'm pretty happy using the Insight but its reliability is putting me off having another one in once my warranty expires.