I echo the comments by the previous reviewer. This Helperchoice website seems to have been founded with good intentions, but then got sold (?) to a new operator who seems to seek maximum profit from potential employers / users. They present the website access packages eg as a two week time period, but then go on to charge you automatically on your credit card every two weeks - under a misleading different company name (!). Surely it's somewhere legally covered in hidden fine print, but some people might call this almost a scam. By the time one has figured out what's going on, they'll have charged you several times. So they charge you more than a real employment agency (which would actually do all the paper work, immigration etc for you and the helper), while Helperchoice is merely a database with some profiles (and they do nothing really)
As for the questionable quality of their helper profiles, we ended up with two consecutive cases of helpers signing an employment contract and then disappearing / ignoring contact during the visa process (presumably they felt they found a yet better job).
Use this website at your own risk...