Yes, i was the first to buy the 451A Sprint Booster from him. He's getting some good feedback. I recommend him highly, I had the product in less the 6 days. Works great. He didn't include any instructions tho. But they can he found online here. I paid $280 + $20 shipping and it was worth every penny. The first day i felt like a whole other car, but as time goes on i notice it less. But I'm sure i could really tell if I didn't have it. I guess you just take it as normal when there is no lag, but you really notice is where there is. Buy one.