Amazing concretebsaw for the price. The fact that it comes with the blade is value already as a comparable blade this size will cost you $30‐$50.
I used mine to cut through 4in concrete slab with 1in terrazzo on top of that (so 5inches total). It did the work fine.
The only issue I had with the tool was that it would trip my breaker (despite the GFCI on the cord) whenever the blade would get bogged down. I was able to remedy this by doing a couple of light passes instead of just one aggressive cut. Essentially whenever you feel the blade getting resistance, ease up a bit.