Captures some human sentiment incredibly well, coupled with the unique setting and great acting, this makes Insomnia a good watch, worth every minute of its two hour runtime.
That said, I was not as enamoured by it as others might be. Perhaps if was unaware of what Nolan, Pacino or Williams are capable of at their highest levels, or if I didn't realise five minutes before the end that I'd actually seen it as a kid and could exclusively remember the ending, then it would have had a higher impact on me.
But even taken for me as is, Insomnia is still a very solid bit of filmmaking.
Final rating:★★★ - I personally recommend you give it a go.