I bought this product hoping it would save me some money. The dealer offered me $120 per tire plus labor to install and configure new TPMS sensors. The first thing I learned during research was that you need a tool to sync new sensors to your car's system. Luckily I found one here at Revain that cost me $11, I was surprised by that price as I thought they were way more expensive. The next hurdle I encountered was taking the tires apart and installing new PMS sensors. I tried Walmart first, they said they would charge me four bucks for a tire so I agree. It didn't work, they called two hours later and said they didn't know how to jack up the car. I then called the big O tires and they said they would fit them for $15 a tire but they didn't have a timing tool. I said that I have a sync tool. When I got home I put the car in TPMS learn mode, their different ways to do this check your car model and year. I then went around the car and touched each tire with the timing tool. Everything went great, I can only recommend this product.,