Anyone use these rulers for blocks?
 

Much as I don't like to admit it, I am an easy hit for a new quilting gadget. I saw these online today and wonder if anyone has used them. Supposedly they make the cutting of triangles and HSTs foolproof, if that is possible. Your comments are welcome before I part with more cash.
www.guidelines4quilting.com

Looked at them on line, intrigued, haven't spent the money

Personally speaking, I'm not one for buying every single specialty ruler they have, I have a 4x13, 6x24 ruler, 9" and 12 1/2" square and my June Tailor Shape Cut ruler, these more than serve my purpose. As far as I'm concerned, the Shape Cut ruler is my go to ruler, as far as I'm concerned, it's the best thing since sliced bread.

One of the ladies in my quilting group demonstrated these for us on Saturday. They looked pretty easy to use, and she loves them. Says triangles come out perfect every time!

I would definitely buy if I had some extra money!!

They work only if you work ... seam allowance wise, I would think. Not sure of the need for this as add ing the amount for seam allowances.

However I like their ruler when I am making just one block per month and rush to finish it. I have gone from a 'finish it as soon as you get it' quilter to a last minute quilter.

I have not seen these. They may be good for some, but don't think I will buy~

Look interesting, but for HST & QST I like to cut larger then trim.

i wouldn't buy them because i do OK with a regular ruler... but i did enjoy watching their animated demonstration :)

I'm a sucker for gadgets too. I've spent good money on things I'll use once or twice. I think it's addiction. I don't think I'm even going to look at them.

I don't mind at all admitting I will buy any new quilting tool. How will I know if it is something I'll like to use if I don't try it. I'd like to hear from someone that does have this and their opinion. I don't pay attention to posts saying I don't need it if the poster hasn't used it.