Even though the free version is easy the pro version is very complicated. If u're using PHP they offer no documentation as to how to add it to ur site. They just give u a few examples & tell you to figure it out urself. Even then u'll still be riddled with problems. On top of that they're never around to offer assistance. Their live chat is never online and they take forever to answers emails. When they do help u'll have a hard time understanding their english since they are from Romania. Avoid!!