I have several sets of Marti Michell templates, from the basic A, B, and C, to the P set for the feathered star and the Giant Dahlia. They are great for rotary cutting. They wouldn't be so great for hand sewing. When I hand sew I mark the sewing line and then just eye cutting out 1/4" past the lines.
I don't know what the other templates are but if there is a hand sewing line then that's probably best for your needs.
When I first started I used things like the plastic lids of margarine tubs for my templates. Draw the shape on the lid and cut it out. I saw the one for dresden plate the other day in my sewing room. :-)