I have had opposite luck with both companies. I have a Raymarine Sport Pilot Plus and had problems with it right from the start. I called Raymarine and the tech. department made me jump through hoops before allowing me to send my unit back. They kept telling me it was installed wrong. It was back for repairs 3 times before they got it to work correctly. In the end, some part was not lubricated in the factory. The first 2 seasons, I did not have my auto pilot and was not reimbursed for it (3 year warranty and I only got to use it for 1 of the 3 years I paid for it). It has worked great since. I hope nothing goes wrong with it because they no longer repair them or have parts for them . As for Lowrance, I have owned their products for years and they have been Awesome.