From start to finish, the whole buying experience was very smooth and seamless. David answered all my questions and concerns. I’ve only used the red light for a month, so it is a bit early to post results but, so far I love it. it is one of my favorite things to do at the end of a busy day. I’m also still learning the jist of it, but so far, all is well! it came very fast, and packaged very well. looking forward to future purchases.