I have been using the Remington F7800 Shaver for a year now. I have found it produces a good close shave even under the chin. I frequently use it on two days growth and, though it takes a little longer, it still provides a good clean shave. It takes about 90 minutes to fully charge which enables about 7 shaves before recharging is necessary. The last shave is as good as the first.
The body groom product is excellent but the foil and cutters do need replacing to maintain the close shave. Replacing these is a lot cheaper than buying a new shaver