I have one of the Roundabouts. I use whatever cutter I have in my hand at the time. I usually use Quilter's Select cutter but have other brands. I don't have the Martelli cutter though. I haven't noticed any damage to the mat and it's a few years old and still looks good. I had DH cut a Quilter's Select mat to fit the Roundabout so I have it on top of the Martelli mat now. I like the QS mat better but that's my personal choice.