I built a very similar list based on what I saw Reid playing. Deck is really strongly and consistently turn 1s, brings a big goofy smile to my face every time. Great not to have to set up Yawgmoth's Will to win. Even if your first attempt to go off gets countered you have late game against blue.
You keep drawing threats that must be counted and eventually your opponent runs out of cards, one resolves and you win. If I expected a lot of blue would be tempted to play one defense grid main, it can always be tinkered/tutored for in a pinch if there is a spell you have to resolve.
Chain is great, I've generated enough storm count to win with chain plus tendrils a bunch of mana rocks and three land in play.