I have used Kapco, the only thing I don't care for is the thickness, always seems to be the hardest stuff to weed. I find Oracal 651 less difficult to weed than Kapco, but otherwise ok. Also use FDC and General Formulations (which I think is unbranded FDC) which weed very easy. I am going to be trying some Colburn fluorentine gold on a window job this week.