Eclidus is quite challenging. Expect a significant challenge unless you are an expert Rubik's cube solver. There are over a million possible ways to set up the fundamental puzzle, but only one of them is correct. The combinatorial problem was successfully adapted for mobile devices in three digital twisty puzzles. 

For the basic puzzle, the level of difficulty lies halfway between the Pyraminx and the traditional Rubik's cube; eclidus prime should be somewhat easier than the traditional Rubik's cube while eclidus mini should be at the Pyraminx level.