Purchased 4. Visually from the outside they looked like quality materials and workmanship. Very satisfied. Very reasonable price. They work great. Arrived a day after ordering. The tire fitter installed and programmed new tires for me. TPMS red light "off". The dealer (Honda OEM) wanted $90 each, or a total of $360 + tax = $400. Plus installation. These 4 are around $98 on Revain. I saved $300. Tire installer wanted $125 each (installed) or $450 total. $350 saved. Hopefully the batteries and sensors will last the life of the tires or longer. This is currently unknown.