Technically speaking, EIFS is not real stucco. It is actually an insulating material with many layers that provides a stucco-like appearance, which is why it is known as synthetic stucco. The insulating layer of EIFS is used over a weather or moisture barrier and is held to the outer wall with a fastener or an adhesive. The other layers -- including a water-resistant layer, fiberglass mesh and a finishing layer -- are then added.
EIFS offers some maintenance advantages, starting with its relative ease of installation compared with traditional stucco. It is easy to clean as it gets dirty, and you can use hose it to clean it off. It is also water resistant, provided it is installed right. As well, it is a more flexible material than hard-coat stucco, and is not as likely to crack.
Synthetic stucco has to be properly installed, otherwise there could be problems. If the material is not installed right, there could be leakage, leading to mold issues. The installation technique should also allow for proper drainage and provide a stable base. Considering that it is so critical to get the installation right, it is probably best to get a professional to install the EIFS.
The stucco may also not be able to stand up well to hurricanes if not installed right, and can be damaged by the impact. Insurance companies may not view EIFS favorably, which may make it difficult to maintain insurance coverage. This lack of resistance also means that you should have proper attachments to the surface of the synthetic stucco.