Unique concept, but I wouldn't want to mess with having to put inserts in arrows, and --as already mentioned-- you're adding weight and will also need to re-sight everything.
Seems like a solution looking for a problem that other rests have already solved in a less complicated manner.
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Never trust a bow under 40 (inches).
that thing's a trip. it seems to me it wouldnt hold your arrow 100% steady during release. something about using three magnets just don't seem trustworthy to me, but i may just be trippin.
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-My heart belongs to my family, my mind belongs to my work, my soul belongs to the woods...
-If guns kill people, then pensils mis spel wurds, cars make people drive drunk, and spoons made Rosie O'Donnell fat.