I posted this on reddit a few days ago, but I wanted to post here as well.
I just had the best experience with O+, My mom purchased the 450q reference system from them as a birthday gift for me. She went out of her way to tell me how fantastic they were in helping her. She didn't have a ton of knowledge with the options and they talked her through it and made sure that my system would make it to her before my birthday.
Anyone that treats a Mom well deserves a shout out.
On top of that, I'm loving the system. Speakers sound way better. Balanced across the volume ranges. I feel like I can listen to music with the windows down now. I had a ton of fun installing it myself.