I had one of these done for an endoscopy - it ended horribly. It got “stuck” so I ended up having to have surgery for it to be removed.

Getting that surgery coordinated and scheduled took months all the while my health was declining. Eventually it got so bad that I couldn’t hold down food and I had to be pre-admitted to the hospital a month before the procedure and put on IV nutrition…

Granted I do have an autoimmune GI condition which is what prompted that test in the first place, and the chances of this happening is supposedly quite small but… Yeah I’ll take the endoscopy and colonoscopy over even that small chance of going through all of that all over again…