I just got a couple of cases delivered to my doorstep...
A case is six boosters, i just opened my first. Each booster contains seven 'minis' of which one is huge. Of those seven, three are common, two are uncommon, and one is rare or very rare, plus the huge mini is uncommon, rare or very rare. In my first case i had no huge rares, only commons, but they do look awesome, i think WotC has made this their best set yet when we're talking about quality. The upside was that i had two very rares in my first case. There were no duplicates in my very rares, rares, or even in my uncommons (very nicely done WotC!). There are 12 commons, 20 uncommons, 16 rares, and 12 very rares. Of the very rares you don really want duplicates because they're all named characters (although i could imagine you would want two or more rancors). On to my next case...
edit 1: case two yielded the exact same huge figures, i don mind because they look awesome. The good news, another two very rares, and only one of the rares was present in the first case. i also got my two 'missing' uncommons. Up to the next case. Come on daddy needs a new pait of AT-STs... ;-)
edit 2: Daddy didn't get a pair of AT-STs. 'only' one... and a rancor... *grins evily* It looks like the two very rares are two per case in every case (with some having three were there's a rancor). At this rate iĺl only need six cases to get a complete set (keeps on hoping)...
edit 3: After pening up six cases (36 boosters) i don have the series complete, i still missing three very rares and two rares. I do have two AT-STs, also two rancors and two BARC speeders, not to mention a LOT of huge uncommons. For me it would be wiser to either trade for my missing (very) rares or just buy them on the net.