i just got mine today - #0138 - man, I gotta say -its pretty farking awesome - the extra features alone like the tuner, dual clk div/mult and dual vco/lfo would alone make a nice module.
I can't fully compare it to the O'toole as i never owned one (but have briefly checked them out at Chi knbcn's)
I can compare this scope it to scopes I own - and older Tecktronics 2445 analog and a new Rigol DS4014 digital
For the audio range the Mordax display pretty much matches my Rigol (albeit its display is not nearly as large)
and its a lot simpler to use. I didn't find a manual but its operation is obvious and intuitive
The Mordax Guys are going to be very busy trying to keep up with all the orders