The transmission has gone out. This was replaced by Acura without cost to me. The fact that many people have had to replace the transmission more than once is unacceptable for this brand. I will never buy another Acura or Honda.
6/10 for performance? This is not a sports car and most people are surprised as hell to find out how much power it has for a 4 door sedan. Not sure what you are expecting, but last I checked it is a entry level performance luxury car from Japan, not a Lotus. Prior to the Infinity g35, let me know what sets your performance expectations high enough to give it a 6/10 in its category.