I was recently tasked with having to configure online payments for our charity website built using WordPress.
This involved reading various exhaustive manuals and testing my knowledge of php scripting which was going to be time consuming. I searched for a plugin that would do most of this for me and I found WordPress Shopping Cart Plugin from Tribulant.
It completely removed all the hassle and headache from configuring online payments for our charity website and also saved me a lot of time. I found it very intuitive to use and the responses that I received from the support team were quick and informative.