This is what I've seen of them. They offer college students (who don't know better) really bad credit card deals with high fees and high rates and sneaky "gotcha" contract terms.
Although I may be overly harsh since my impressions of them are all based on their credit cards. For all I know, their other banking services are ethical.
Also to be fair: by the time Capital One acquired ING, I was too old to know many college students so my anecdotes were all from before then.