I can't speak for the durability of the templates, but the set that crazyforpooh seems to be interested in (at least looking at the picture) is a layered/themed template. The way they showed it on DIY Scrapbooking, you first chalk a chunky letter. Then you lay the themed template down, erase and rechalk (or use markers, etc.) the top layer. The results really are neat. (See link to the DIY article above.)