I have a MAG256Wi, the 'Wi' denoting it's for wifi as well as for use with ethernet hard wiring - but as always it depends in what level of internet connection you have to use it with.
I have a fairly constant 60mbps download speed and thus get good wifi connection via my MAG256Wi.
However it's not really relevant now as this model is now obsolete - although may be available on fleabay etc?