Can I get an AMEN? There were so many mistakes, I documented all of them. Just for fun, I wrote a 12 page document covering each mistake, where it was in the instruction manual, and what was needed to correct it. I sent it to them hoping to get at least a "thanks" or something, but I never heard from them. After several years, the instructions are the same. So they obviously don't give a ****. I consider myself to be an excellent mechanic. But I had to call their tech line three times. The guys on the tech line were knowledgeable and helpful, but if I wrote the instructions, the tech line calls would be cut by 75%. You are right, the instructions are assuming you know a lot about AC systems. The quality is great, and the system runs great, but the instructions are so bad, I would not recommend them.