I've never considered getting the paint chips. I pick browns I like, corals I like and aquas I like - and that look good together. They may or may not match Bonnie's colors, but I like the way the look together so that is what I go with.
If I were making blocks to swap with others, then I'd want to match more carefully.
Two mysterys ago I bought the EZ Angle and Companion Angle and use them a lot. The Essential Triangle ruler is both of these combined, since one has lines going one way and the other has the lines going the other way. These are all 45 degree angles. I bought rulers last year that were for a different angle - I think that is the Tri Rec set - like them too.
If the new ruler was for an angle I didn't already have rulers for, I'd be buying it. OK - if I had found it locally I'd probably have bought it, but don't feel like going to the trouble to order one.