If you use heart for setting up a reseller business your asking for the kinda headache that that forgetting your birds name in bed and calling her, her best friends name can only dream of being. Remember that you must pass hearts TOS /AUP policies as a minimum to your customers.
This step alone has sliced a quarter off in the bands, storage, graphics, mp3 and video users. It also kills another section with the no adult rules. You have at worst ruled out half the paying customers, at best a third.
Like one and none, heart seems to ok for the b2c business but their b2b business leaves much to be desired. I have friends who have simple hosting accounts and are happy but anything else no one is happy. So bear this in mind because it will come back to bite you on the ass.