First, it's a 4-3/8" saw. The title suggests that it's a " 4-Amp 3/8-Inch Tile Saw." It's 11 amps, comes with a water hose, a blade, a blade wrench, an edge guide, and a case. I bought it for a small weekend job that turned into about 100 cuts into slate and concrete. On one 3' long cut, the motor got warm to the touch. That's as near to heating up that it got. I think this thing is a great buy. It has plenty of power. If you use the included blade, you get 1 1/2" of depth for the cuts. Unfortunately, I don't see these blades for sale anywhere, so the replacement blade will have to be the slightly smaller 4" blade sold at any hardware store.
The original blade is still ok after all the cuts I made.
Just a heads up. I've seen reviews that complain about tile saws having no blade guard. That's right - they don't have a blade guard. They also don't come with instructions. You hook it up to water and electric, turn the water on low, and start cutting.
Get yourself a portable GFI to use with this, and use a 12/2 extension cord. It draws a lot of current.