I have the retired trimmer. It's fine, really. The new one just allowed you to cut an A2 card without using the extension arm. And the track swings outwards and away from the trimmer surface instead of up and in your way which, duh, makes so much more sense.
Ah, well. Now that I know I can use any Fiskars replacement blade made for an I-style trimmer, my old one should be good enough for what I do.
But the experience put paid to the idea of considering the Procision cutter. Which I was looking at before I bought the SU one. All the Fiskars trimmers and cutters have that plastic grid protector layer. And until I reconfigure my studio, there's only one place to put whatever I have - right under that swing arm lamp. Great for being able to see the markings but not for anything highly reflective.