What do you like best?
Tweepi helps me grow my presence on Twitter by following new members. The "Follow Followers" tool is a great way to follow people who have similar interests, and in turn, grow your own followers count. I like how you can see when you followed/unfollowed someone to avoid repeatedly having the same interactions with the same users. The dashboard is a really simple way to get an idea of your current followers count, who doesn't follow you back and who you don't follow.
What do you dislike?
I wish Tweepi would add more functions to their free version. I would like to be able to follow people based on recently-used hashtags or interests, however this is reserved for paying users. The "Tweet Search" and "User Search" tools would be especially helpful.
Recommendations to others considering the product
If you really want to grow your followers using the most direct methods, consider paying for Tweepi. Otherwise, its basic functions still allow you to follow and unfollow people, and search for relevant users based on the profiles they follow. I would suggest you start with the free version and upgrade if you feel you need access to the other features.
What business problems are you solving with the product? What benefits have you realized?
Tweepi is helping me to steadily grow my followers and increase interactions with those followers. It helps me identify people with the most followers, and the best follow ratio, who could potential retweet my posts. I've been able to significantly grow my follower count in a relatively short amount of time, without resorting to buying fake follows.