Any experience with hot tub or spa maintenance?


I wasn't too sure where to post this, but - A family member has offered to give us an 8'X8' spa with "duraban", which needs a minor electrical repair. Are these tedious to maintain, is keeping the chemicals in tune a headache? Are there certain things I should look for that would be a sign of costs to come? Any experiences with spa/hot tub ownership would be appreciated...
I am not sure of the make and model, but I'll know by the end of the weekend.