First of all, ATTENTION: the red and the grey are not just different colors as presented, they are different models.
All users, as I read, bought the grey one and the problems regarding a weak motor they mention probably do not concern the red one. Maybe out of carelessness, maybe out of dislike for Manchester's colors, I don't know what to say, they bought the weaker and at the same time more expensive machine! They bought the older, inferior model paying 8 euros more!
The red one has a stronger motor and a larger, more functional blade, it is slightly heavier and maybe has some other small differences. I bought it for its practical shape and the size and design of the blade which promise easy and quick trimming and I was NOT DISAPPOINTED, it really is like that.
But pay attention to something else: as soon as you open the odd packaging box, the place will be filled with accessories that you won't know what to do with or how to store them. No concern from the manufacturer, no design. Very annoying. There is a case in the package that barely fits only the machine and with a lot of squeezing and crumpling of the cables and the charger. Finally, it needs lubrication with every use to work properly. For these reasons, it loses two stars from me.

+ It offers many cutting length options, with 9 combs ranging from 1.5 to 15mm. Without a comb, it cuts at 1mm, while using the blade vertically on the skin cuts at 0.5mm according to the manual.
+ It can be safely washed under the tap, and the blades can be removed for better cleaning.
+ It provides a very quick haircut due to the width and curvature of the blade, which fits better on the head and cuts a larger surface.
+ It is convenient to hold.
+ It has an indicator light that shows when the charging is complete.
+ It does not make much noise.
- Due to the size of the blade, it is a bit difficult for detailed work (e.g., around the ears or sideburns).
The blades cut perfectly, and so far, my battery has lasted for three haircuts with the first charge and continues to work. However, I do not consider this as a positive aspect because I believe it is expected for a new machine. The package includes an additional charger, oil, a small brush, and a case for the machine, although the case only fits the machine and not the other accessories.