PLA is ideal for the fast and reliable printing of parts and prototypes with a high quality surface finish and decent strength. The primary drawbacks of PLA are it's lack of flexibility and low service temperature of 60C.

Good layer adhesion gives PETG parts great overall strength making it a  suitable material for mechanical applications. Decent UV resistance also allows PETG parts to be used outdoors. Chemically resistant, slightly flexible and food safe. A versatile material that has only marginally lower surface quality than PLA.

ABS is best suited to producing mechanical parts that will be subjected to elevated temperatures. It is dimensionally stable and handles temperatures up to 85ºC. It is the same material LEGO is made of.

ABS has poor layer adhesion which only gives it good strength in a single direction (anisotropic mechanical properties) and makes it unsuitable for outdoor applications due to low UV resistance. Vapor smoothing can be applied to give ABS prints a smooth, glossy finish. 

TPU is a rubber like material that has excellent layer adhesion making it extremely durable with near isotropic mechanical properties. It is also a flexible material making it suitable for applications that require flexibility, high durability, and chemical resistance.

CPE is a high strength and toughness polymer blend with great temperature, impact and wear resistance. Due to its excellent layer adhesion and chemical resistance, it is well suited to producing long lasting functional parts.