Thank's Patrick,
I'm using a borrowed one at the moment, and I must say that I'm finding it quite good for what I'm using it for, (Amateur video voice-over and sound effects).
The mic pre's don't seem too noisy, even with a dynamic mic, unless you turn the gain right up to the top, and build quality seems reasonable for the price.
Is your experience with the older series of Alto ?, The ZMX series seem to be made in mid 2011, after Alto were aquired by Newmark , who also own Alesis and Akai Professional.
The power supply seems to be a transformer type, not switched mode like many, and hardly gets warm after many hours of use.
I'm gathering other opinions before making the decision to buy one for myself, they are certainly cheap at £50.
Jon