Unoffical Seestar Wiki

As amazing as the Seestar is, if can't do everything, mainly because the field of view is only slightly larger than a full moon. Here are a few things that come to mind:

It can't track the ISS. It moves too fast. But with a little preparation, you can catch it as it flashes past the sun (or moon)

It won't capture meteors during a meteor shower. They move too fast and appear across a wide sector of the sky

It can't image the Milky Way. Looking out at the edge of our galaxy shows just how huge it is. It covers a wide swath of the night sky