I say excellent only because I have heard amazing things about Skar audio. I spoke with someone at Skar that assisted me in choosing the correct equipment for the set up I am looking for. The customer service at Skar so far has been nothing less than amazing. So very kind and helpful beyond anything I could have imagined. That being said I have not had the pleasure of setting up and hearing my new amazing equipment. I will update as soon as I get my car back from the shop and install my new subs and amp. Looking forward to blowing out my back window. lol. Stay tuned…..