"Occasionally you will get a gem among otherwise boring/useless stuff. BUT. The exclusive content via the pins has been slashed recently, which is frustrating. And considering a lot of promos include nerdy versions of things that can be used (stationary, kitchen gear, etc), there is WAY more in boxes that is straight up figurines - a poor ratio at least. T-shirt designs are also boring as hell - considering the amazing t-shirt art out there, it's pretty poor.
Also, if live outside the US? LOL, you're screwed! Prepare for missing boxes, 6-8 weeks (OR MORE) waiting for boxes to arrive. Tracking is non existent. And the help desk doesn't give a stuff.
If you really want nerdy crates, I've had much better luck with stuff through cratejoy (though there is lots of variation there), and NerdyPost has a good service, and items that are *actually* unique for the appropriate themes."