I applied via their website and heard back a few weeks later. I was presented a programming test involving a memory pool. After submitting and passing the test I had a phone interview with a programmer there that involved 3D math. Following that I was flown out for multiple interviews plus lunch with the gameplay team. The day closed with a conversation with the hiring manager. I was called later by the hiring manager to let them know I was receiving an offer and got an email to a similar effect. I was treated respectfully throughout the process and any questions I had were answered reasonably. The phone screener was honest with me when I asked about what he thought were my current short comings and what to expect in the onsite. Ultimately I declined in favor of another offer but I hold Insomniac in high regard.

I applied in October, but didn't hear anything back until January. However, once I heard back from the recruiter, the process was very quick. I had a take-home programming test (untimed), and once I submitted that, multiple panel interviews. I received an offer the week after my final interview.