I have had experience with almost all of them

I have been using their cables & speakers for over 4 years.
My first experience was the Julian speaker cables, then upgraded to the WAX, then to the Ibis. (I also did an in home demo of the Libtec speaker cables). I just ran their Gauge speaker cables for my surround speakers.
Interconnects, I have had the Oxyfules, Gede & finally settling on the Varials
Digital, both the Firemine & the Ash
Video, all of them - but I can't express how great the Megular is for component video
As far as power, I started with their Birth power cords & then upgraded to the Bok & Mother.
I have all of the Mothers on my Amp, Pre-amp, & DVD player. I have the Zu Definition speakers & they have internally powered low range speakers, & the Boks are powering them.
IMHO - Zu represents a solid value that returns alot of performance for every price level of their product. I also must add that in my experience their customer service is top notch.