My brothers both go on and on and on about how wonderful the PowerQuad is, but I just don't get it.   It seems to me that no matter what I'm doing, I'm either in 1st or 4th and can't shift anywhere if I want to.   I'll take either one of our powershift tractors over it for virtually any job, and I don't see that it really has much of any advantage over the quad ranges.  

That's just me, I know...but I still think the SGB/QR tractors hold their own pretty well considering their age.  Never had a 15 spd and probably never will, but they look like they would be even better.