If you look at Dell, then you might find a rather checkered past. Look around a great number of hospital's, authority establishments and Dell as or at least did have a very good presence.
I dealt with Dell for a number of years, because the benefits were mutual on the promotional or clearance bulk purchases I was able to make with them. That relationship came to a rather abrupt end, when the Dell sales team refused to honour a discount code I was party to. Dell have tried to get me back on their side, but through that one bitter, unexpected and unnecessary experience Dell lost a customer. Their loss or mine, it doesn't matter, its unimportant now.