We use our Bumbo occasionally, for five minutes or so at a time. M doesn't last much longer than that in it, and if he gets tired of it, yes, he can pop himself out of it. We live in an
extremely small space, so I'm never too far away that I can't see/hear him about to do this. Our problem is that we practice EC, and unless he's just gone when I put him in, he seems to think the Bumbo is a potty.

I debated whether or not to get it, but since we literally have
no other baby containers I thought it might be useful. My back needs a break from time to time! I liked the fact that it didn't have a bunch of overwhelming, electronic noise-making toys attached to it. We have a nice clip-on chair too, but haven't gotten it out of storage yet; I think it wouldn't provide enough support for DS just yet. Plus, there are only so many places (i.e.,
one place!) we can attach the clip-on, so we're sticking with the Bumbo for now.