It is my observation that while the Omnipod works for 72 hours, it appears that the insulin (Apidra) loses effectiveness during the last 24 hrs and I often run pretty high then. I haven't thoroughly documented this but intend to soon. It has come to my attention in researching this problem that both Apidra & Humalog indicate that the insulin in a pump reservoir should be discarded and replaced every 48 hours. This disconnect creates a problem with insurances and increases the cost of using Omnipod effectively by 1/3. Do you Omnipod users have some feedback about how long the insulin in your "reservoir" is effective? Which insulin seems to get the best overall results? I'm contemplating trying Novolog which appears to have a longer "life span", similar onset rate, peaks faster than Apidra but slower than Humalog. Expected duration for Novolog is 3-5 hours, Humalog 2-4 hours (max <5 hrs), Apidra 3-4 hours. What about "tails" on the three? Thanks for any insight you can give me.