I spent two years on MDI. Before that, I'd been on pumps for about six years, a t:slim X2, then the t:slim Mobi, so I wasn't new to the concept. But I'd made a deliberate choice to step away from pump life for a while. No tubing, no sites, no supplies to manage. Just pens, long-acting, and a CGM on my arm.
For a while, it was fine. Then it wasn't.
Why I Made the Switch
Three things pushed me toward the Twiist pump, and honestly none of them were "my doctor told me to."
The first was control. Two years of MDI had taught me a lot about how my body responds to food, activity, and stress, but it had also shown me the ceiling. There's only so much precision you can get from a pen injection. I wanted tighter management, and I knew pump therapy could get me there.
The second reason was the Eversense. I've been using the Eversense 365 CGM, the implantable one, and finding a pump that actually integrates with it felt like a long time coming. The Twiist is the first pump to do that. That alone made it worth a serious look.
The third was the tech. The Twiist is a newer system, and it showed promise in ways that made me want to actually try it rather than just read about it.
The First Week
I'll be honest: I wasn't sure what to expect. I'd been off a pump for two years. I figured there'd be an adjustment period, that it would take weeks before I really saw any difference in my numbers.
That's not what happened.
The first week, my glucose control was noticeably better than it had been on MDI. Not slightly better. Noticeably. The kind of improvement that makes you think why did I wait this long. The system was doing what it was supposed to do, and my body was responding.
I don't say this to oversell it. Every T1D is different, and what works for me won't work for everyone. But my first week on Twiist genuinely surprised me, in the best way.
The Hardest Part
The hardest part wasn't the tech. It was the supplies.
After two years on MDI, I'd gotten very used to a simple routine: two injections a day, CGM on my arm, done. Going back to pump life meant relearning a whole system, sites, cartridges, tubing, what to carry, what to keep at home, what happens when something fails at 2am.
None of it is hard, exactly. But when you've been away from it for two years, there's a re-learning curve that nobody really warns you about. Your muscle memory is gone. You have to rebuild habits that used to be automatic.
That's the tax of switching. It's worth paying, but it's real.
What I Wish Someone Had Told Me
Genuinely? Nothing that would have changed my decision. That's the honest answer.
The switch made sense for where I am right now, the Eversense 365 integration, the control I wanted, the tech I was curious about. If I'd read a post exactly like this one two years ago, I probably would have made the move sooner.
If you're sitting on the fence about switching from MDI to a pump, or switching pumps entirely, the thing I'd actually tell you is this: your reasons matter more than anyone else's experience. Mine are specific to me. Yours will be specific to you. But if better control is on the list, pump therapy is worth another look.