Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Bad Choice-Just say NO !!!!!!!

I purchased these plugs after veiwing them on popular tv shows. I also looked at previous reviews on this site. I should have heeded the reviews more than the selling points of the sponsered tv shows. Within a month after installing these plugs I now have severe misfiring. I am sending these plugs back to E3 under thier warranty. Hopefully they will refund (at thier choice) rather than send me replacements that I no longer want or need.On the other hand I did get better gas milage for about a tankful of gas(midgrade)but that stopped after about 100 miles of my nexted fillup (same gas, same brand).I reccomend that you think about another brand and listen to other reviews rather than buy into another gimmick.