Anybody else use a seatbelt harness for their dogs?

I use one for my 3 month old yellow lab. She rides in the back seat all strapped in.

Been thinking of getting one. How restrictive are they for the dog's movement? My back seat is flat, made into a comfy dog bed. Can the dog lie down, stretch out, move around in this harness? Do you have a photo of your dog in one? Thanks.

The harness can be a bit restrictive, but it is really good to keep your dog still and safe.

I will have to get a picture on here of my dog in the harness.