My kids had Walmart and Target BSO's growing up. The group sets were Shimano, and likely the cheapest possible Shimano. I never had any issue with them that bending the hanger or adjusting the DR wouldn't fix. Oh, and spraying lots of lube in the FW's since they left them out in the yard in the rain instead of putting them back where they belonged. This idea that a inexpensive groups are junk is getting old and tiresome. IMO, probably people think this because they used those groups BITD when they were still little kids that abused bicycles and weren't good at DIY yet.