I just took back my pioneer HU and exchanged it with a Kenwood one and brought new steering controls and finally the controls are now all working, whoever told me my head unit was at fault.
I feel like im going to be sick!!!!!! It all seems to be working ok at the minute, in regards to money ill probably wait and just see what happens I guess, if the HU stops working within a year, ill send it back under warranty.
Thats not the info i wanted to hear 
Misuse and poor fitment is unlikely to be covered by warranty....
lol id hope they will never know, but more to the point hopefully it wont come to that (although judging in regards to the ohmidge) then it might.
To be perfectly honest, this whole bose set up seems to be a big hassel for many people, I mean even when i had my orginal vauxhall stereo, it wasnt really all that good anyway 2 of my mates had bose in there audis and GOODNESS that made a noise, although I guess the set up in my car (when it was all bose) was around 6 or 7 years old by now.
The bose setup isn't bad for a mainstream factory fit. It won't go to the power levels of a chavved up Corsa, but does it need to? There are far better aftermarket systems available (though I can't find one that looks good in the Omega yet).
Replacing it is fairly straight forward, but needs to be done by someone who knows what they are doing - be it a car audio shop, or an enthusiast who understands car audio.