I've been using electric shavers for over 20 years. I've mainly used Braun but also Panasonic. This is the best I've used so far - no-nonsense design but best technology in terms of blades and motor.
If you get a Panasonic shaver, definitely get one with their 'linear motor' - as well as this I've had another one of those in the past which was excellent, but the ones without (which I had previous to this) are not nearly as good. This one seems to work pretty well. The li-ion battery seems to last quite a long time too. It's a little annoying that it still uses its own charger rather than a USB-C port or something, but otherwise, this is good.
The Panasonic LL21 is simply light years ahead of my Braun 3040s which it replaced, I just don't get this trend for swivel head razors, please make more fixed head models like this, it shaves close, it's smooth, powerful, quiet and easy to clean with the sonic burst system, my only criticism is the long, awfully cheap flex wire on the charger, please can we have the flexible/springy coiled type of wire that is so much easier to use and store!