Shipt demands a lot of my time. It's exactly what I'm looking to give right now, but I understand how that could be a negative for some.
Processes aren't rigorously defined. I tend to value the freedom in defining them more than being frustrated by their lacking, but it seems to frustrate some.
The growth trajectory Shipt is on leads to growing pains as change is constant. If you aren't comfortable with change, I wouldn't recommend Shipt.