What do you like best?
The Trade Desk has an incredibly user-friendly interface which makes it a powerful tool for programmatic buying. My favorite part, the combined pivot report which can be exported at the campaign or ad group level, displays the data in a client-friendly view. The report makes it easy to identify optimization opportunities at a glance, or you can dig deeper with the raw data. There are so many different ways to look at the data TTD collects, you could spend hours digging through it. Depending on what your advertiser's goals are, different viewpoints could prove to be incredibly powerful for you and your team.
Also, TTD recently rolled out Private Marketplace partnerships, where you can either utilize pre-negotiated deals that TTD has set up OR you can negotiate with the site/channel on your own and implement with TTD by using a "Deal ID".
What do you dislike?
The only thing I think Trade Desk could improve upon would be the "Wiki Help" section. It has very short answers set up in a conversation format, which aren't very helpful when you're looking for a solution. I typically reach out to our rep when I've exhausted the Wiki Help resource, and end up taking a portion of their time to answer the question.. Which could all be avoided if they had a more substantial help section.
Recommendations to others considering the product
Utilize your Trade Desk rep as much as possible. They can connect you with TTD "traders" who manage campaigns for multiple clients at a time, and use that experience to assist you with your goals as well. They can run through any report and point out optimization opportunities, or they can identify different opportunities in the actual UI to save money or achieve those goals more efficiently.
What business problems are you solving with the product? What benefits have you realized?
By utilizing the Trade Desk, I'm able to leverage their tools, targeting, and third-party to maintain business goals for a variety of clients - all at a cost-efficient scale.