I've been using the Developer Express Universal tools for years (8+) ever since I saw Mark Miller do a CodeRush demo live in Southeast Michigan. In all that time, I've never had an issue with their tools, but found a bug I couldn't really figure out today...
Shortly after I became a customer and noticed my productivity skyrocket. I sent them an email about how much I love their products. In return, they sent me a T-Shirt, USB thumbdrive and pocket knife, and a pen.
Sometimes it's great same-day customer service and the little things that a company does to keep their customers.
Thanks again DevExpress!