I have no personal experience with them. A google search shows peeps have misfires with them after a while. There are some good reviews too but mostly from advertisements. If you do take a chance with them if you get any misfire issues don't forget to start with changing plugs back to stock.
Well I decided why not let's put em in. Actually runs pretty good. I'm not saying omg they add power! But the vibration/misfire at idle is gone so that's a plus. Took me about a hour with a lift. Oh and if anybody has over 80k miles be ready to buy some plug wires lol. 3 out of 8 broke.