Board Thread:Game Discussion/@comment-108.212.224.100-20130728034947/@comment-27862737-20161126192429

Generally, like most RNG (Random Number Generation), the chests are iffy. Sometimes you get great stuff, sometimes you get garbage. IMO, they are not worth the gems. I recommend that you save your gems, join an alliance and go for a push to a T50 or higher. You'll get better rewards that way and can get much better armors than the chests will normally give you (unless you're lucky).

Also, in case you weren't aware, you replied to a comment from over a year ago (October 2015).