The initial part of the interview process is a take-home assessment using Lytmus' own product: An Ubuntu Linux environment with multiple questions that are much closer to real on the job tasks than the typical coding challenge.
I enjoyed the assessment much more than the types of assessments I've done before. Having an environment that's already up and running was much more convenient than having to install a bunch of dependencies on my own computer and getting them all to work before I could even attempt the problem.
The environment also makes for much more interesting questions in the assessment. Instead of algorithms heavy questions that don't even test skills that you'll actually use on the job (How many developers have ever actually had to reverse a linked list on the job?), the questions I had to solve were much more realistic.
However, the environment could be an obstacle if you have never used Ubuntu before or aren't familiar with the editors that are installed. Fortunately they have an application to sync files from your computer to the virtual machine running the assessment, and you're also free to install applications inside the machine if you want to take the time to do so.