I just used Prime for a move cross-country. I could go on and on but I'll sum it up by saying that our stuff arrived 26 days after it was picked up--we were told it would take 5-10 days.
We were promised 5 wardrobe boxes. They showed up with one and threw the rest of our hanging clothes in boxes, which arrived in a tangled mess, wrinkled, one dress torn.
Everything they packed (pictures/art) was damaged in some way. Every picture frame was dented or scratched. One picture had broken glass, one mirror was broken.
Worst of all, a very valuable antique chair arrived with a broken leg and crushed back--the upholstery on the back was torn it was pushed in so hard.
Halfway through our stuff being delivered, I noticed 6-7 boxes in the house that were not ours. I had to tell the moving guys about it and they moved them out. While they were unpacking our stuff I noticed them standing on top of someone else's dining room table.
I made it clear that anything that said ""bedroom"" on the box should go upstairs and of course that didn't happen. So we had to move most of the stuff upstairs ourselves.
Just a really, really bad experience--they did not take good care of our stuff at all.