I trust them, but always remain vigilant, because things can change over time. But the founders initially were scientists who met at CERN, not a company that launched a product. That tells me quite a lot. Yes, over time they are becoming more professional, maybe more like a regular company, but i feel that privacy is still the main priority for them. They also organize a yearly event and the money they raise goes to certain projects that are related to privacy and freedom (if i remember correctly for instance to help journalists remain free press and things like that). Yes, it's one of the few companies that i really trust.

Also, yes, they sometimes are forced to give info to authorities (and they are quite open about that and explain what happened if people ask about that), but don't forget that they don't have much info on their clients, because everything is encrypted and they just cannot see what's inside a mail, for instance. So, they can't share that.