The pros. If it works as advertised, it's a miracle for $69.99+ $5 s/h.
The cons. If something sounds too good to be true, it usually is.
I don't know of anything in this world that can deliver 50 HP and 50 ft-lbs PLUS increase mileage by 3-6 mpg and all for $69.99
Careful to note they don't have a phone number nor physical address if you want to contact them you need to email only. That in itself should send up some flags.
I also notice if you have any installation questions you need to email them. The install kit includes 1 Set of easy to read installation instructions
• 2x Quick connects
• 2x Butt Connectors
• 2x Black zip ties
• 2x Pieces of Velcro
Don't know about you but I'm not a fan of velcro on my cars. Also what happens if the chip doesn't work? return policy? nope don't see any. Don't have a mailing address so guess what?
That's all I have to say. BTW, if all the chips look like what's in their picture, I have no idea where you would install it.
Sorry if this isn't what you wanted to read.