Good luck with it! I tried Omnipod over the past summer and, while I liked being “tubeless” and the feeling that I had more site options (arms were less worrisome without tubes!), I had several problems with it. For no reason I could determine, I needed more insulin with this system than I needed with my previous one, and, depending on the site, I found the pod itself a bit heavy and bulky. As for the PDM bulkiness, I managed that by buying a belt pouch for it. After years of carrying older cellphones that way, it wasn’t a big “change” for me. FYI, it’ll easily fit into a pouch that fits an old Palm Treo or an older Blackberry , but there are several nice pouches designed for the PDM out there.
For me, in the end, I went to back to tubes and to the Animas Vibe. (I’d been an Asante Snap user, so, when orphaned, I had “trade-in” deals from Insulet, Animas and Medtronics to consider. I already use the Dexcom G4. so the Vibe seemed like a good idea to me. My doctor recommended the Omnipod, so I tried it first.) After switching, my insulin usage went back to the previous level - so somehow, for me, I just needed more with the the Pod. ONe thing I did learn from the Pod experience, though, was that I like arm sites, so I’ve learned to use those even with (longer) tubing!