It will increase your vote power. Right now, the price of steem dollars is higher than steem. As long as that is the case, it's a good ratio. It takes a lot of steem power, however, to get a very valuable vote. At my current level (my highest was over 16k steem, before I powered down to pay for a wedding, and some other things) my vote is about 30 cents, depending on the price of Steem that day.