I've not seen the output, although for the volumes we do and the need for a perfectly straight edge, it wouldn't work for us, which is why we took the VeloBlade route.
Even with the VeloBlade, to get a perfect cut, you have to get the position where the drag knife starts somewhere other than the centre of a straight cut line, to prevent an imperfection.
Another thing, if you are intending on cutting full bleed digital without lamination, test this and specifically ensure you're happy with the output and that the knife isn't wrecking the toner on the cutting line. Full bleed die cuts with flaking toner leaving white speckled edges is not pretty.
