Snow Wolf says: "I've been using this Panasonic electric shaver with nano blade technology (ES8228 or ES8109) for the past 2 months and love it."
Although both shavers (ES8228 and ES8109) have nano blade technology, there appears to be a marked difference in quality between the two. I refer to another poster at Amazon by the name of Klopus (I'm not Klopus - he's not even my brother-in-law!) whose review is of the Panasonic ES8168. But read his sixth paragraph, the one that starts with the words "Then I realized ..."
The consumer might want to keep the thoughts expressed by Klopus in mind when deciding between the ES8228 and the ES8109. The ES8109 is considerably less expensive than the ES8228. Usually in this world, you get what you pay for.