The other bonus to renting in maui is that you can try out different boards / sails and can change gear to suit the wind on a particular day.
It can be worthwile just hiring stuff for a day trying a different brand each day then going back and getting a weekly deal on whichever one took your fancy the most.
It will cost you more to hire from differnt shops but you do get to use a huge variety of boards / sails to find the one that suits.
Each brand pretty much has its own shop that rents its own gear.
Neil Pryde - JP boards pryde sails
www.neilprydemaui.com/Maui Windsurf company - Goya + F2 boards / goya sails
http://www.mauiwindsurfcompany.com/rental.phpNaish Maui Pro center - Naish + quatro boards / sails
naishmaui.comKanaha kai maui - Starboard boards / Maui sails
www.kanahakai.com/gear-rentals.htmlPritchard windsurfing - Tabou boards / Gastra sails
www.pritchardwindsurfing.com/( I used pricahrd last year and he delivered the gear to my apartment on sprecks beach)
Second Wind Maui - North, Mistral, Ezzy, RRD, Sailworks,OES, Chinook, HPL,PowerX, MFC
secondwindmaui.com/