My experience- it's a bit of a gamble, but not a bad bet.
For the price, I've usually been happy.
Almost no incorrect caliber bullets in what I received.
I did get one batch of 230gr plated .45acp pulls which had been so badly crushed (as FROGO207 said) that some of them fell into the sized case. They averaged .448".
I never returned those or complained-- I just shot what I could load for warm-ups and threw the rest into the pot for cast bullets.
Also, the one batch of 9mm 'premium mix' was a nightmare --ditto what DanK3pos says-- in a 500 count, I got 63 different bullet styles- like 13 of one, 7 of these, 22 of another...yergh.
ETA: they were in good shape, just a lot of different varieties. They do warn you about that.
Everything else- 9mm, .45, and .223 mostly, has been fine.
I'm currently working my way through a couple thousand 9mm 124gr plated pulls I got from them just a few months ago- almost perfect, for around .08 each delivered.
That's pretty good deal.