Interlocking stone has evolved leaps and bounds from the days of the standard 4×8 stone laid in a herringbone pattern. There is a wide range of looks from tumbled to textured finish, to lockstone that is hard to tell apart from natural stone.
Lockstone is now made differently for certain applications such as thicker stone for driveways, stones that allow water to penetrate through the stone to enter the water table, and your standard stone for walkways and patio.
All products have a lifetime warranty, but have to be installed properly.