Saxo, as a multiple Berning owner, I can only agree with what tubegroover and TWL said regarding its abilities and advantages.
However, I'm not quite sure what you mean by the amp 'appearing and disappearing'. If you mean availability of the amp to buy used here on Audiogon, they certainly are less commonly available used than more mainstream products, but that does not mean that there is something 'wrong' with them. There was one available a week or so ago here; it isn't there now, but that's probably because when they come up, they sell fairly quickly. Actually, I was thinking of buying it myself to compare a 'solo' 270 to my monoblocked ones, but common sense reared its ugly head. Both of my Bernings were bought through ads I first saw here on Audiogon, in fact.
However, I'm not quite sure what you mean by the amp 'appearing and disappearing'. If you mean availability of the amp to buy used here on Audiogon, they certainly are less commonly available used than more mainstream products, but that does not mean that there is something 'wrong' with them. There was one available a week or so ago here; it isn't there now, but that's probably because when they come up, they sell fairly quickly. Actually, I was thinking of buying it myself to compare a 'solo' 270 to my monoblocked ones, but common sense reared its ugly head. Both of my Bernings were bought through ads I first saw here on Audiogon, in fact.