Only thing I didn't like about the older Burris scopes was their eye relief was more critical than a Leupold.
It's true that the eye relief on the Burris FF II scopes is slightly less than comparable Leupolds, but so far I haven't found it a problem on rifles up to 30-06. I haven't used Burris scopes on any really hard kickers though.
Not the eye relief distance so much what I didn't like was that if you shifted your head a little they tended to black out.
