I just bought a June Taylor "Shape Cutter" ruler and it's fantastic. It's a 12" x 12" 'mat' with slots every 1/2".
It's like using a rotary cutter with training wheels.
Cutting strips is amazing. If you have 44" fabric, you just fold it twice so it's 11" wide. Place the ruler on top and slice through it at every 2" or 2 1/2" or 4", what ever you want without moving the ruler! I've always had problems with my ruler shifting but this thing even gets me cutting straight. For a rotary cutter, I like my Fiskars comfort grip handle - Squeeze it together and go. I use whatever blades I can find on sale.