Guys, need help on this one

Anyone of you tried wimax 4g from smart or globe? How fast is this? I know for certain that there is a prepaid but we have to buy internet, but what is the assurance on this?

is wimax from smart or glove fast internet? if anyone tried this, can you post what is the speed and the provider? is it smart? is it globe? and are there any down time? any issues? problems?

THanks Guys.. !!!