Sorry, just tryin to help based on your query of good and bad about them, I assumed you needed proper info.
I've learned to not try and talk to those disillusioned by old wives tales, and bad-boy biker tales of how safe half helmets are. Almost as silly as those who actually believe DOT ratings mean anything at all.
We all make personal choices, and many of those choices are cited in police reports and memorialized in eulogies. My choice is Snell rated or ECE, others choose to gamble. To each their own.
Best of luck finding what you want. Safety and all that aside, your choice of spending more than $30 now is a good one.
Check out helmetharbor.com kneedraggers.com revzilla.com for quality helmets, and video reviews of many of them... Halfies included.
2012 HD Road Glide Custom - Black denim