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Just wanted to post an update, I just did my oil change today and I noticed that the magnet actually does pick up metallic debris. There was a small greyish layer of metallic sludge covering the head of the magnet that was easily wiped off. It wasn't a large amount of metal by any means - nothing to be concerned about, but it does show that these engines do have ferrous metal components inside that do wear (cam shafts, valvetronic shaft, valve springs, timing chain, etc). So these magnetic drain plugs do work, and aren't useless as many speculated.
Another thing to note was my oil temps got to 106*C in comfort mode before I shut off the car to drain the oil. So it was extremely hot and the magnet didn't lose its magnetism showing that turner does indeed use a very good quality grade n42 type SH neodymium magnet.
Overall it is a very solid product and I am happy to have it.
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