I have had the 13" carbon fibre arm paired with a VAS cartridge and Lenco (on a slate/aluminum composite plinth) for a short time now and the resulting sound is the best I've heard from my system.
It's not a perfect system and there's always room for improvement but I greatly appreciate the Viv Lab for several reasons.
It sounds very good, from the first to the last track. I won't even try to come up with an explanation. Not my job to know why. My job is to enjoy the music.
Arm set-up is simple. I don't think this can be said for many (or perhaps any) sophisticated tonearms. Try it at a dealer: bring your own cartridge, mount it, and see for yourself.
Mine is mounted off the plinth and sits on a large slab of metal. This seems advantageous to me because the largest source of vibrations is probably my turntable itself since it contains a heavy spinning platter as well as a motor. There are 3 threaded holes at the bottom of the armbase so I'm certain one could attach it to the plinth with some careful measurement and drilling. But I would not do this since the arm's mobility allows one to move it to a second or third deck. It also allows different cartridge to be installed and positioned easily. So I applaud Viv Lab for bringing to market this arm that lets the user move it easily. One arm may serve multiple decks. And with the detachable headshell, swapping cartridges and re-positioning the arm has become a simpler chore.
I also appreciate the magnetized oil used in the bearing reservoir. It's a brilliant material application, and its implementation is again simple. It's nice too that carbon fiber is an option.
I welcome this change from convention. I'm glad to have bought the arm sight unseen (and unheard) and I truly think it's a gamble that's paying off with every single record I play.