I think it's a worthwhile tool to find how much yours and other people upvote are worth. Any tool that increases transparency of the Steem platform normally is a good thing. There are already a lot of tools on Steem that help gather information about the platform like Steem.Supply that shows where your revenue comes from and www.Steemdollar.com which displays how much your Steem is worth in BTC and U.S. Dollars. In the end, they will all make you a better user of Steem since you can make more intelligent decisions.