They work. We use them - if your cutting fine stuff... You may notice some Knicks though.
The blades have more play in them, so they don't cut perfectly. If. Your cutting stuff bigger than half an inch its not noticeable... If your cutting small store graphics, stick with the regular blade holder.. Yes it's $290... But you. Probably just dropped 8-10k on the graphtec... The holders last ten+ years, so it's not that expensive.