Should I trust Kraken?

Should I really trust Kraken? I've heard some mixed reviews about their services. Some say their customer support is top-notch, while others complain about long waiting times and unresolved issues. What's your take on this? Also, I've noticed some fluctuations in their exchange rates. Is this normal, or should I be worried? And finally, how secure is Kraken in terms of protecting my funds and personal information? I'm really considering using them, but I want to make sure I'm making the right decision.