Has anyone ever bought a rotary cutter blade sharpener? Do they work? Are they worth the investment?

I have one and use it fairly regularly. It does extend the length of blade use, particularly if you switcht the blade to the other side. Not sure I'd buy it again though because it is hard to get "dead spots" out of the blade sometimes.

I got mine with a 50% off coupon at Joanns and then found one for the bigger blades on the markdown - so for what I paid for them, yes, they were worth it...
just be careful not to cut yourself (ask me how I know)

There have been a lot of mixed reviews on these... it is on my list though :D:D:D

I've been wondering about this subject also. I figure it would be worth it to invest if for no other reason than to get a few more cuts out of each blade. Sort of the same principle for sharpening knives isn't it? On my list of wants also. :D

I've got one and it does extend the blade a little.

Just be careful, 5 stitches and no sewing for a week tells my story!!

on my list too.

Yep -- I've put it on my "wish" list too....

They have such mixed reviews I decided to wait on one.