I am not a professional, but I am involved in haircuts and I cut my own hair.
Positives: long cord, powerful machine that does not get stuck anywhere, even on the mustache, very good build quality, it is definitely more than what we need at home but it is worth it especially for young people who want detail, big difference compared to 40 euro machines and finally it is really beautiful externally, it catches your eye. (also, if you cut your own hair, the amortization is quite fast if you consider that a haircut outside usually costs 8 euros and above. Personally, I have short hair but I want to maintain it constantly before it reaches the point of looking like a ball, so I definitely want 2 haircuts per month)
Negatives: it does not have many guard sizes, however the teeth move several millimeters so that you can smoothly transition from one guard to another, the problem is with the larger guards that do not exist and you will simply need to buy some numbers (maybe 19 and 25)
P.S. read the instructions carefully regarding cleanliness and lubrication of the blades

Awesome tool. Very powerful machine. It weighs 450g, almost half a kilo, but its weight doesn't bother and it is well-balanced. Its material is of excellent quality and sturdy construction. I use it for my parties and for grooming. It doesn't hesitate at all. In previous years, I used rechargeable ones that had a lifespan of only 2 to 3 years, and I always had anxiety about the battery running out. Not to mention they were made of plastic. Here, the upgrade is significant, like riding a bicycle and now riding a 1000cc motorcycle. No comparison. The packaging includes a comb, 4 fixed ladder attachments of 3mm, 6mm, 10mm, 13mm, oil for the machine, and a cleaning brush. Also, the machine has a lever to adjust the tooth distance. So you can play with millimeters. Without an attachment, you are at 1mm to 2mm with the lever. If, for example, you use a 3mm attachment, you can play up to 4mm with the lever.
Get it.

Incredible machine... I use it for amateur haircuts and with the combination of premium heads, it works wonders!! It never gets stuck... it never clogs! I've been using it since 2009 with love and proper cleaning, and it will last you forever... Wahl quality...