I started with Omnipod 5 about two weeks ago. It was a bit of a rough start for my first few pods but now that I’ve got things figured out I am loving it. As soon as I switched from Novolog to Fiasp I got better results. Here is my graph of the past 24 hours, range 70-150:
Only a few Android phones and no iPhones can be used with the O5. That was not a problem for me…the Omnipod PDM is fine. It is an upgrade from the Dash PDM, it has a larger screen and a better screen layout which is easier to use.
The O5 definitely has some quirks that took a while to get used to. The main defining quirk is the way that the “Auto Mode” works. It dribbles out small amounts of insulin, every five minutes, according to its prediction of your BG in 1 hour. It does this by reading your CGM and trend directly, in my case a Dexcom G6. This is explained in detail in some publications such as this one: Review of the Omnipod® 5 Automated Glucose Control System Powered by Horizon™ for the treatment of Type 1 diabetes - PMC (nih.gov)
The greatest benefit of the Omnipod 5 for me is during those times when I don’t want to or can’t pay attention to my CGM. Sleeping and those gaps of 3, 4 + hours between meals. The Auto mode works great for making its own decisions about basal needs during those times as long as you bolus correctly at meals and correct manually when your BG trend is starting to go off track. If you go off track, Automode is not good at bringing down a lingering high BG and has no way of correcting a low. When correcting a high in Automode, it seems like correction bolus adds to IOB which then causes the algorithm to reduce the size of the auto basal causing a diminishing return over the next hour or so.
It sometimes counts part of the auto mode dribbles as basal and part as correction bolus, which seems to be based on where your BG is trending at each five minute interval. But it does this “behind the curtain”, resulting in IOB numbers that are hard to believe. In other words, you can look at the bolus calculator and it will report an IOB number that makes you say “How could that be?”. That IOB number was derived from a fraction of your Auto mode insulin over the past few hours. I often ignored that calculated IOB from Auto mode.
In Auto mode, it will go for long stretches (hours) of giving you zero or close to zero insulin. That happens if you are flatlining below the “goal BG” of the Omnipod 5, which can be set no lower than 110. For me, I had those long stretches of no basal in the early pre dawn times and often in afternoons. They caused a problem of breakfast bolus not working as it should have, with huge long lasting BG spikes. The way I solved that problem was to switch to “manual mode” about 30-60 minutes before eating. By making the switch, now I was back to getting basal according to my basal program. Manual mode also lets you use extended bolus, which is disabled in auto mode. Then about 60-90 minutes after eating I switched back to auto mode, once I was convinced that the CGM trend was headed the right direction. After struggling with the IOB calculations the PDM was reporting to me, I ended up using manual mode for all meals and I bolus just the way I used to with the Dash. That means I have to ignore the IOB in the bolus calculator when appropriate.