WTxRed

I see a lot of the Twister quilts that are super cute and I can feel them inching their way up my list. I have a question for those of you who have made them.
I wonder if you could 'share' the technique so I can really decide if I want to make one.
I think I may've seen somewhere you sew your squares together then lay the template over the center, trim away - you have a twister. I think with the ruler (or is it a tool?), there's got to be another 'way'.
I'd also like to understand how you piece these together after you get them all made. I'm not asking for patterns - just to understand the technique please.

Thanks in advance!