I don't think anyone could assure you 100% that any freelancer would be able to meet your expectations when we don't know what those expectations are, however I can say I've been extremely satisfied with the work I've had done on the rare occasion I asked for professional help with something. You will need to do your homework though and look at references/past work of these people to be sure you're making the right choice- just don't go with the first or the cheapest.