I have no experience of omio, but there are a few members here who do.
There is a good discussion here http://www.mycncuk.com/threads/10673...sheet/page5#49

Not so good stuff here.
http://www.mycncuk.com/threads/10078...-2200L-machine
http://www.mycncuk.com/threads/10618...ck-there-of%29

Cheers