I have seen lots of those in my life. Pretty sure they are not good. According to my "An Instant Guide to Insects" they are one of about 300 species of "seed bugs". "Most feed on the seeds of grasses and other plants or suck plant juices". Related to chinch bugs and it may be a Milkweed bug. It does have nice colors.
well I have several box elders at my place and we had a huge number of these for a while ...we sprayed a couple of years and used a systemic on the box elders and no more bugs so I go with the box elder bugs too