Here's a cautionary tail. I had my first piece blow last December at Joshua Tree. My partner asked me, "do you want the beta for this?". I said, "sure I want the beta". He said, "there's an orange Alien placement in that pocket there".
Indeed there was an orange Alien placement, and I proceeded to stuff the cam in rather carelessly on this basis, rather than carefully examining the quality. The pocket flared on the inside and I had pushed the cam in too far. When I fell on it, it inverted and I decked.
So if someone gives you beta, use your own head and don't rely too much on the beta.