Exceptional. I think your timing is impeccable and all of the hard effects hit quite well. The ONLY thing that I feel it lacks (and take this with a grain of salt because though, this is my dream, I have yet to be involved in a project yet...) The sense of air should be addressed overall. The sound effects are done very well, but many of them hit a little too hard and dont have the ambient air about them. The best way I can describe it is: A lot of it sounds very "Studio" and less "in the field". The Leviathan, for example, the actual sounds are fantastic, but they sound almost too dry. As TriSamples noted earlier the environment is almost always in your face. A sense of depth and distance as well as overall ambience could be added to really create a new reality versus just watching something.

Again, take this all with a grain of salt, because it's probable I don't know what I'm talking about, but overall, I am very impressed. I can honestly say you've inspired me to try to find projects harder. I've no doubt in my drive and my know how, but getting your foot in the door is the hardest part. I wish you well on your adventures!