I give it a 4 because it hasn't even been a month since I bought it. For now, everything is fine. I would like to mention that there are many labor costs involved in installing sound systems. I paid 120 and then another 40 for a second amplifier. You should calculate these costs before purchasing. Also, I had to change all the speakers, front and rear, in order to withstand the 4x70 watt power of the amplifier, and the radio CD player because it didn't have RCA connections. So far, I've spent around 650. It's a good deal, guys. Oh, and I will probably need a more powerful battery and a 2-farad capacitor, but they cost 150 euros. It's quite expensive, to be honest.
In the end, it burned out, so I'm giving it one star... What a shame... Kenwood doesn't have any quality. The speaker in the photo is the one that came with the box. It burned out twice. It doesn't even have a brand name or anything. It's a cheap Chinese product