I have 2 June Tailor rulers. One that cuts half inch increments and one that cuts quarter inch increments. I know what you are saying about getting your cutter in the slots but after using mine for quite some time I have overcome that problem and would not give these rulers up for anything. The speed with which you can cut multiples of squares and strips is invaluable to me not to mention the accuracy you get.
I am considering the Accu cut 2 though because of a serious arm injury I have which requires me to clamp down my rulers before I cut.