My son screamed solidly in the car from 5-6 months and we turned his seat around from 6m. DP and I had both had minor accidents and at least he was enormous. Also totally different baby ff. I also had a shoulder issue and he was horrendous to get into the seat. However knowing what I know now I probably would have tried a new seat. Although he hated being worn as well and we tried 50 million carriers.
Really hoping to do extended rear facing with the twins, hopefully they're easier than their brother was. Maybe starting on capsules will make a difference?
Now at 5 he is still in the harnessed 0-7 we bought when he outgrew the 0-4 at age two. He will be going in whatever fits in the middle!
So glad I am not alone. Was a bit scared to admit I turned my DD to FF as soon as she was six months but I think we were actually safer without the constant screaming distracting the driver. She had bad reflux and the more upright position once she was forward facing really helped. It also reduced the amount of vomit in the car seat...
She went into a 6 month - 8 year harnessed seat at about 2 and half when she outgrew the 0 - 4 one. I will keep her in that for as long as she fits, and then see what is available.