I really liked it, me and gilbert are very similar, we look similar, we have the same personality, in general i can relate to him in a few ways. I do not cry while watching movies but one scene really far in hit me like a truck and i actually had a tiny bit of tears while watching it. His family treats him very similary to the way i am. It is in my top 5 movies along with A silent voice, Metropolis 2001, Shrek and Apacalypto.
The guy who did Arnie is so good at acting where it felt very real, the way he talks and moves and his facial expressions. I give this movie a 10/10, it is a must watch.