I recently purchased this product for a one off job so didn't need for it to last a lifetime just to do the one project.
Sadly, the quality is poor, the Blade is of a thinner steel than the original and therefore the saw would not grip it tightly if at all. So, I was left with the saw spindle running at full rpm and the blade just revolving slowly with no chance of achieving a cut.
I did mange to cheat my way out of it and got to cut the one sheet of timber I had planned for but on safety grounds, I wouldn't recommend that you try it. Circular saws are very dangerous pieces of kit and if it goes wrong you are going to get second prize and a trip to the nearest A&E at the very least.
So, would I recommend that you buy? No, spend a few pounds etc and buy something better with a recognised name. Bosch maybe.