I also know that we've administered tens of millions of these shots in the US over the past several months. The success rate is overwhelmingly positive even if you consider the failure rate to be a tick worse than the standard vaccination. I'm not some guy yelling at everyone to go get vaccinated because I think the chance of an acute negative reaction is higher than normal, but I'm also unconvinced of any long lasting effects due to the protein hanging around. That part is gone within 24 hours. If you have a negative reaction to it, you may have long lasting consequences. I expect that if anyone is having asymptomatic (for now) effects to the vaccine, we should begin hearing more about it as we approach 12 months with these vaccines in circulation.
Believe me, I want little or nothing to do with the vaccines right now. I'm much more interested in having my immunity tested because I seem to be carrying some. It's just that for anyone without immunity, getting vaccinated would appear to make sense unless... you plan to just sit at home, which is something I already mostly do.