The best thing about conqera is its user friendly interface, it has all necessary tools to create quality documents in no time at low cost! I dislike nothing so far but maybe some features could be improved like better templates for letterhead or envelopes etc., also i would love if you can add more fonts other than just Arial/Times New Roman font which are included by default with this product; however these things may not matter much as they have many useful options available already out of box without any extra charges from customer side (which makes them affordable).
We use CONQERA mainly because our clients require us only one document template per format we provide - Invoice / Credit Note & Receipts- And rest everything else comes under customizations made using their drag n drop tool within few clicks!!