This is the 3rd version on this product I've bought, having only needed to replace older models due to battery life becoming diminished. (They really should make them so the batters can be changed... easily)
This one seems to be an improvement on what was already a good design. It glides without snagging or pulling hair. Trims quickly without having to repeatedly go over areas. Possibly slightly quieter than the older model. Not sure why they have done away with the charging cradle, I quite liked that. This rubber flap over the charging port will surely end up letting in water. Not that I've used it wet yet as from experience with previous models they used to clog up a bit when hair was wet.
All in all I would recommend this as it does everything you need in 1 units.
Can't give it 5 stars though simply because of the price. I really do wish they weren't so damn expensive.