Sorry, hate to be the only negative person here. I have them in all the sizes, joined a buck a block group and one thangles were required. It was my first experience with them and I was not happy. When I made the HST with a stripe fabric, the stripes were going in the wrong direction on half of them. The same thing might happen with a plaid fabric. But I had to use them and those blocks still are not my favorite. If they had provided a wider piece of fabric I would have done them 'my way'. I just feel that I can make HST's much faster by sewing 1/4 inch on each side of the center. I have a piece of tape on my machine to follow and never have a problem with them. The other reason I did not like them is that they are too much like paper piecing and that is the least of my favorite things to do. The points might be perfect but I hate tearing that paper off the backs of them.
By all means give thangles a try and decide if it's what you like.