I have had this particular product for a few days and I have tested it. As the owner of a large 3.5hp 50cm chainsaw, this small one with 1.34hp and a narrow (curving) blade without gears, specifically 25cm, works great. It is powerful and has a good performance, especially after the initial setup: (for the first 1 liter of fuel + 25ml of oil (for two-stroke engines!) (it takes about 3-4 refills) and smooth cuts on branches, without full throttle, with moderate acceleration at low RPM just before the chain starts rotating to lubricate the cylinder. For the second liter, 26ml of oil is needed, and then always 25ml per liter, which means a 1:40 ratio, so for 5 liters of fuel, 125ml of oil is needed.
It starts very easily, cuts everything, and is durable. The chain does not loosen easily after several hours of cutting (note: because it does not have gears, the first time, lubricate the chain with a few drops of oil in the groove of the blade and adjust the oil pump setting from below to the maximum position (do not force the screw, it only rotates 90 degrees) until the oil pump starts working, then after sufficient lubrication, turn it to the minimum position, which is enough for the oil quantity).
Do not overtighten the chain so it doesn't get stuck... the chain should be able to rotate by hand with a little force (I mention this because I saw in the comments that some people burned the blade).
The machine is Euro5 and does not emit a strong two-stroke smell, and it has low fuel consumption.
One thing that impressed me is that it does not heat up and cools down quickly. After a break to refill the chain oil and fuel, it takes 5-15 seconds to warm up.
The factory idle settings are a bit high for my taste, so I adjusted it slightly to reduce noise and fuel consumption at idle.
After a few more tanks of fuel, the choke will be removed (the metal part under the filter, which makes it smoother, quieter, and more responsive to throttle) - it does not have temperatures below 0 degrees, for better breathing (a bit more responsive and agile), and the carburetor will be adjusted with the special screwdrivers (if you are not sure how to adjust the carburetor, seek help from someone with experience).
The chain it comes with is very good, it cuts dense wood easily and does not require much pressure.
From what I read, a rocket is achieved with a blade with bearings and gears, so an upgrade will be considered at some point.
After 10 liters of fuel, the spark plug will be replaced with DENSO or NGK.
It is well-balanced, even when full of fluids, and it is comfortable to use.
The cost of all the things I mentioned does not exceed 25-45 euros and makes the machine better than the 300+ euro pruning tools.
After almost daily use and cutting several tons of firewood (it has also cut many logs because I was too lazy to carry the big one), I can say that the chain is very durable, does not get stuck easily, and cuts dry and burned wood easily. I bought a second identical spare chain and have not needed to replace it yet.
The machine, after the initial setup, including changing the Chinese spark plug, is a pleasure to use. It does not have any temperature issues and I have used it continuously for 3.5 hours, only stopping to refuel and lubricate for a maximum of 4 minutes, and everything was normal with the plastics and exhaust. Of course, daily cleaning with a cloth and brush for the ventilation holes is necessary. The letters on the blade faded, but that is understandable, and it did not affect the performance.
A positive aspect that you do not mention anywhere, only in the instructions and I even tried it, is that if the blade hits (hard) for example from a branch, trunk or the chainsaw falling, it automatically engages the chain brake.
Special attention!! It is relatively dangerous (for the left hand), compared to "classic" chainsaws where you always have both hands on the machine. It is also very maneuverable (you can easily make movements and you need to be careful not to touch your leg, hand, etc.) so I would not recommend it for a beginner who does not have relevant experience with standardized movements.