Ask HN: What was your experience with a virtual assistant?

Have you had any experience with a dedicated virtual assistant? What was it like? Was it worth it? Were there any pitfalls or negatives that you would forewarn about? I'd like to hire a virtual assistant for about 10 hours per month to handle phone calls, day-to-day minutiae, scheduling, utilities, etc. This would require giving access to my personal information. Is this a concern or non-concern?