Nothing is wrong with it. It isn't the best shifter I have ever used, but it does the job just fine. However, if the option of a short throw shifter comes I will buy it just because I feel I would enjoy it a bit more then the stock one.What's wrong with the stock shifter? It's literally perfect, it sits at the perfect height, the throws don't affect driveability or spirited driving (even then if you have a mostly stock 1.8 or 1.6, the throw of the shifter is the least of your worries).
I like my Versa, with what i've done to mine, it looks essentially like a butch Mazdaspeed 3, with way more room. That's what i'd like to compare to, if it was as fast as a Mazdaspeed 3, that'd be great. But, i'm doing the swap soon, after i pay my rent and after next paycheck.