Due to several good reviews I bought this tool, because my old SIM card in the new Sony Xperia M no longer fit. An exchange my prepaid card with a new Micro card would cost 10 euros extra for the provider. That reminds me of this tool was better and cheaper, especially because I also few other foreign prepaid cards have to trim. Anyway, I have this first map so processed correctly, even though the contact areas were also partially cut - my card was still a very old version to me large contact areas. The newer cards have smaller contact surfaces and are therefore better to work - they will no longer be customized. It is only important, easy to break the cut contact surfaces with a file in about 45 degrees, so that they can not make a short circuit to the metal guide the card (if someone such metal guide has in the phone). The cut edges are fairly clean, but not 100% perfect. A very slight reworking with smaller file made sense to me. Overall, I am fully satisfied with the result, the tailored card works, the leftover from the big SIM card outer frame you can still use well as an adapter for the card if you want them put back to the normal card slot.
