The best way to ensure you work well with someone is to simply try it. On PPH you can simply start working with someone for as little as as one hour and see how it goes. Not much can go wrong if all you’ve wasted is one hour.
If you are committing to larger amount of work we recommend that you look at the Sellers profile and past reviews.
We highly recommend you use the Escrow facility sensibly, only release funds when you get the work agreed for the Job or particular milestone you set with the Seller.