After the first cut I made using this saw I was very excited and happy because the material cut was a 105mm full steel cylinder, medium hard, and the blade was cool after the job. The motor block was just around 40 degC. Fantastic, in my judgement. The second cut was finished in the next 15 to 20 minutes and that was also to my satisfaction, given the really heavy job at hand.
I attempted the third cut on the same stock and have realized that something went wrong. The grinding noise told me that. It became louder and louder and then, I noticed the blade was out of alignment. I started panicking and the motor kept working until it stalled. At that moment the blade was warped by several centimeters out of the plane. It took several seconds before I turned the machine off.
Analyzing the event I concluded that the massive size of the material and its round shape made it too difficult to hold it in place at all times so it shifted axially.
Then I realized how good this product is. It survived so much abuse and it is still working.
I would only recommend replacing of the half-nut vice with something better or an improved version of it.
I did not see spare blades listed on this website. I believe, with respect to my experience described, it is a very tough product worth investing in it.
I recommend the machine.