I spoke with Al initially. He was helpful. An appointment was set up for 10:00 - 11:00 the next morning. The install tech said he was running late and would make it as soon as possible.. After some time I called and he said he has been dispatched to other appointments "the other appointments have been waiting" . He advised me to go home and wait for his call. I received a call to meet him "he was on his way". When he showed up, he presented two batteries that were too small to effectively start the diesel. He insisted these batteries were "ok". I know the correct battery and this was not it. He called in his manager told him to install the incorrect battery. Wasted day. I checked in with Al, he said a refund would be processed. As of now I have not received a refund.