There is no single answer to this question. Plastic window cleaner and prosluzhat a long time, they do not rassyhayutsya and it is very difficult to damage, unlike the wood. Plastic boxes are manufactured within 5 working days, but the wood from 30 to 50 is dependent on technology. For wooden windows need more care. And normal, high-quality wooden box will be at least 50% more expensive than plastic, but why pay more if the same effect.