In a nutshell, the IC is a pretty terrible grinder in most respects except for the quality of the cup that it produces. It is loud, slow, plasticky, etc. but you cant fault it in the cup. The Ascaso I-mini is very similar, but with a nicer fit and finish. I havent had a chance to run them head to head, though, so I cant comment about relative speed or noise, but I recall them being similar.
Personally, I think that stepless grind adjustment is pretty important for getting great espresso. I actually found it easier to get better shots on the IC than on the Rocky that I had for a while. Frankly, I have often heard the claim "the steps are small enough that its not a problem," but I have still never used a stepped grinder without wishing that it was stepless. That said, Im sure that there are many people out there who dont mind stepped grinders.
The number of turns required to move an IC from espresso to French Press puts it squarely in the espresso-only camp, unless you are very determined. The Mazzers and Compaks are probably the most civilised stepless grinders for going back and forward between french press and espresso, but even then I still found it enough of a PITA that I bought a cheap sunbeam grinder for non-espresso use.