Pretty good, but not great...
I researched and researched and then I researched some more and eventually selected the 8140.  While I do like the unit, it does not shave as close as a blade.  It is quicker then shaving with a blade, easier, there's no mess, etc.  The unit is also exceptionally quiet compared to other electric razors I've used in the past.  It's lighter then I would have expected.  The new head design is also more advanced then Norelco's I've used in the past and it does a better job in tough spots like your chin.  I have no intentions of returning the unit and I will continue to use it happily, but it does not shave as close as a blade.  The good thing is that when you come home from work with that 5-o'clock shadow, you can spend less then 60 seconds running it over your face to get a quick clean up. Lastly, it's a nice looking shaver and having the ability to clean it under the tap is great.  I do recommend this product.<br /><br />UPDATE JANUARY 2009 - I've been using this razor at least 5 times per week since originally posting this write up.  A charge still lasts a good two weeks.  I've replaced the blades once.  I'm still very happy with this unit.
Rating: 4 stars