Allen and Heath QU 16 as an interface, any experience? Latency?

This looks like a great digital board.  Records standalone to multitrack wav files in the field without a DAW.
 
In addition it can be used as a multitrack interface using USB.  I am very anxious to see if anyone has actually tried one of these with Sonar, and if so what kind of latency they are getting, and with how many live inputs, at what data rates etc.
 
Using either guitar amp plugins or soft synths live (and for recording)  has been very doable thing using a good high end i7 machine and my old Tascam FW board using Firewire ASIO I am getting good results with very low latency (with conservative use of plugins and unfrozen tracks), but this old board has its problems (the rare driver blue screen) and just its age.
 
I am very interested to see what kind of latency this board has.  The definitive test is record something on input track, echo it back to the master out on the mix, while also recording the monitor output on another track/input.  Then  zooming on on the recorded wave forms and measuring exactly the round trip latency.
 
If I can't find out that this board would exceed the performance of my FW1884 I don't want to spend the money on it.
 
Also I am considering the new tascam USB 16x08 but it seems like it is on hold because of driver problems.
 
I have USB3 (and firewire) on a very current high end i7 machine.
 
Any help out there?
 
 

I use an Allen Heath ZED R16 via firewire and love it.  No noticeable latency at all.

I am very interested to see what kind of latency this board has.  The definitive test is record something on input track, echo it back to the master out on the mix, while also recording the monitor output on another track/input.  Then  zooming on on the recorded wave forms and measuring exactly the round trip latenc
 
This is called the loop back test and it's not really testing RTL unless you un check 
Use ASIO reported Latency and leave the offset at 0.
The audio drivers will report the latency to Sonar and the reported latency is added in etc. So the loop back test should always show perfect line up of the waveforms unless the driver is badly written. 
We have a thread running where I'm asking people to test their interface. 
http://forum.cakewalk.com/Lets-all-TEST-our-Interface-driver-for-offset-m3178396.aspx
 
 

Hello all.
I recently purchased the Qu-16 and have done all the necessary updates, installed the ASIO drivers into my Lenovo y70 Touch, and the latest Firmware into the Qu-16. Sonar and the Qu-16 are interfacing, but I'm only seeing the odd numbered tracks from the Qu-16 in the ASIO driver page in Sonar. Has anyone else had this problem,and if so can you recommend some possible solutions?
 
Thanks
Sean

scook, thanks so much. I feel like an idiot. But yeah, that's exactly the best post you could have referred me to. Thanks much!