It is the only way my husband will clean a fan even though he can reach! I personally had to get up on step ladders and I prefer this method rather than paper towels, less residue falling to the ground or on things!
This does clean fans, however, if they're ceilings above 9ft the extension will not reach. Also, if the dust has been there awhile it won't remove it all. But, if those two things are not an issue you'll love it!