With a good draw, the Quantum towers provide enough quanta to be able to cast more or less anything in your hand, and then start using their abilities straight away. All the creatures are either aggro drivers or creature control and most of them do not conflict with each other in terms of the quanta they consume. The Steals deal with troublesome permanents like shields and weapons (or alternatively, pillars in quanta-tight decks), and Eternity handles any larger creatures that cause trouble.
This deck is excellent for exploiting the AI's weaknesses. It has trouble dealing with good Aether-lock decks and extremely fast aggro decks. Its weakest matchup is Mono-Fire, since they can a) drop dragons to which you have no credible answer - poison isn't fast enough and Eternity gets rapidly deflagrated; and b) Fire Bolt your small creatures. Otherwise the deck can beat most of the t50 most of the time. I've no idea how well it copes with the Level 6 decks and top tier decks in PvP.
On further experimentation I have swapped out the Pegasus for another Steal, and that seems to be upping the success rate against Mono-Aether (and other decks as well). The Pegasus is probably the weakest of the aggro drivers and it isn't usually missed. An alternative which I have yet to experiment with would be to swap it out for a Twin Universe.
Suggestions and comments welcome on the talk page.