What do you like best?
What I do like most about TweetDeck is how I can have many feed columns and each of them with totally different information. For instance, my feed can be in one column, next to that one I can have direct messages, next to that one a list of users, next to that... you get the point.
This is really convenient since I don't need to click different links to see the same data. This is why I prefer TweetDeck so much rather than seeing the same information on Twitter.com
Other features that I really like is scheduling tweets and notifications while you are doing other things. Notifications are the best! You can set up notifications to only appear for specific things.
What do you dislike?
Having many many columns can get sometimes overwhelming. It can be hard to read all columns all the time. However, if you keep it really organized, you shouldn't have any problems at all.
Recommendations to others considering the product
Just jump in. It's really customizable and the fact that you can read many things at once, it does make it really convenient. You won't regret it. Plus is free!
What business problems are you solving with the product? What benefits have you realized?
The main problem that I solved using TweetDeck is time and efficiency doing my work. I get alert notifications on my Mac for certain things.
Also, instead of going to each blog or website, I can get informed really fast of everything just by reading my feed and list of users on TweetDeck.