Just curious - are they on 50 or 60 hertz?
They are at 50 hertz. Their main problem is that unless you buy one and have the electric company install it and charge you for it monthly - they do not use transformers on the poles so the power pulses a lot - using a small transformer helps some, but does not smooth it out quite right and it is still at 50 hertz instead of 60 hertz like ours is, which translates into shorter lifetimes for electrical appliances and such - especially the ones that are converted or are being used with a small transformer.

