What are the Disadvantages of using SV?

-SV will still promote the 2 Party System that FPTP Hails. Smaller Parties have less of a Chance -Winning Candidate may win on the Second Preference Votes, meaning More People wanted someone Else Really than the Wining Candidate -Still Results in Wasted Votes if the Voter doesn't pick a Candidate that doesn't make it to the Second Round