I`ve been using it for the past 4 years on a Yamaha digital mixer 01V96i,and I even used it lately with a small stienberg soundcard,the latency is excellent ,it works perfect with Sonar and Pro Tools.
Yamaha uses the same usb audio driver for all their hardware so they can keep improving it by concentrating their resources on one driver ,I guess.
One small issue ,every once in a while it hangs,you have to switch of the hardware and back on but it does not happen very often.
Peace

Yamaha because they are  Stienberg and Cubase put work into writing good drivers. I used the ASIO driver that came with our Yamaha mixer in WDM mode along side my Tascam us1641 without issues. Of course you can't use ASIO with 2 interfaces.  
This was just straight multi track recording only. I don't trust WDM mode for overdubs. The loop back test shows tracks are recorded out of sync in WDM mode but not ASIO with the Tascam. 
 
But I also had no problem switching interfaces in ASIO. Best to restart Sonar but often it just asks me. 
 
 
 

maltastudio
I`ve been using it for the past 4 years on a Yamaha digital mixer 01V96i,and I even used it lately with a small stienberg soundcard,the latency is excellent ,it works perfect with Sonar and Pro Tools.
Yamaha uses the same usb audio driver for all their hardware so they can keep improving it by concentrating their resources on one driver ,I guess.
One small issue ,every once in a while it hangs,you have to switch of the hardware and back on but it does not happen very often.
Peace

I have been using rhat driver for 2 days now with my 01v96i I am making progress, what i have learned is there are no designated outputs persay and it only list channels in odd numbers. I am curious as to how you are using the 01? I have had no sleep in last 2 days trying to figure this thing out, any suggestion on how to send audio to various outs? Example headphone mixes to a specific out? I really like the sound it produces, I would love to take advanatge of its compressor, gate and eq realtime, if you have any tricks that can help me I would geatly appreciate it