IBM

Cool technology (depends on the team/group/product you work on). I've been fortunate to have worked on a team that provided many PoCs for Fortune 500 companies.

I've also been unfortunate to work for a very lame and useless team as well. You could really feel yourself losing brain cells by the minute. Management was waaaaaaay too old! They were very out of sync with employees, technology, etc.

Like most of the useless teams/products that didn't or don't make money, kill it. I've heard from former co-workers, they pretty much outsourced all of the work for the team I listed in the "downsides" section.