I have it in my house. It was built about 3 years ago. Love the stuff. The pipe is cheap and easy to use. The fittings can be expensive. Most hardware stores carry brass. However if you go to a plumbing supply shop you can get plastic fittings for about 1/4 the price or less.
Next the crimper used for PEX is expensive. But once you have that it's the only tool you'll need.
Note, the larger diameter pipes do not flex all that much but you can make full bends provided the radius of the bend is big enough.