To meet different needs, instances in BLESS are divided into solo dungeons and raids. There are powerful monsters and challenges in these instances, of cause, the loots and rewards are satisfing.
This guide explains the formula you should look to follow, so you don't have to waste time on things like learning the UI or knowing exactly how to get EXP. The general formula for efficiently leveling to 45 is as follows.
An initial look at the Bless Online creature taming system is provided by the devs, showing off some of the hundreds of critters awaiting capture.
Looks like another interesting game and here is the new trailer for Bless Online.