I bought this saw based on the other reviews and its apparent good value for money. Unfortunately, the construction is very poor and I haven't been able to cut a single log! So what's the problem? As soon as one starts to saw one is aware the blade isn't cutting vertically downwards but is veering approximately 30 degrees off the vertical with the blade bending accordingly. After numerous attempts, and jams, and getting a friend to try too (who incidentally had just cut down a tree with his own saw!), the conclusion was reached that there was a geometry error in the saw -- meaning that the blade was offset from the main geometrical 'line' of the saw. The blade is secured with a quick release mechanism that is very flimsy in its construction. I don't think this helps.
The saw I was using before I bought this sawed through my logs with ease; log after log. It is really important to have a decent saw to be able to make reasonable progress. Unfortunately this saw isn't fit for purpose and a refund has been requested.
In fairness, it may be that I was unlucky and bought a rogue; but I feel that the general apparent flimsiness of the blade (either due to intrinsic quality, or the method of fixing it) means that another saw would be a better buy.