@CaP
We noticed some irregularities with repitier host early on which were hard to diagnose. We decided to focus on getting the printer to work well with ponterface first before tackling other software. We use Marlin firmware on a RAMPS 1.4 board so start with googling tips on how to get repetier host to work with them. This is a very common combination and it should be easy to get some good information.
On a side note, the printer will run amazing well with Octoprint on a raspberry pi and we highly recommend researching this if you are interested.
We also recently have run the printer from Cura, by Ultimaker, and this too works well but it requires a firmware tweak to reduce the acceleration values by 10x or else the print head will skip. We hope to release this new firmware soon.