"When the unit is mounted normally, as over 90% of people will likely do, meaning the unit is right side up with the controls facing upward, there is NO Jell-O effect. It is only when you rotate the unit upside down, or invert it into helmet mode or hold it upside down that the Jell-O effect becomes noticeable."
After seeing your post, I went out and walked around with the unit a bit last night. I hadn't noticed any jello-ing in the last week or so of use, but for the most part, I had been keeping it in "handheld" mode with the rounded sides/larger image.
Flip it to "helmet" mode, and the screen automatically goes to 70% size to get it into 1x unity) and I still didn't notice jello. But I should say I don't have the proper bridge/mount setup right now, so I was fighting the bridge-adapter-sandwich I'd made to get it on a TW helmet I usually use with bridged PVS14s. My bigger concern/annoyance was with it bouncing around more than wigglyscreening... so I've got to get that dialed in before I can evaluate for certain, but walking around with it didn't seem a problem.
Spotted some deer bedding down in the foothills last night around 1am, they were out past 500 yards, so with 1x pretty much looked like four legs and a head, but the thermal signature locked right on.