My experience was meh at best. Taskrabbit wasn't available in DC until pretty recently, so I only used it for research tasks. One of them gave me what I needed in a convenient way but was sloppy about it (looked up things in DC but not equally close ones in Maryland, and didn't account for time zones when sending me calendar invitations, which I found out by showing up an hour late for an appointment).

Others seemed like they didn't read the task description very closely, and looked for things satisfying their preferences, not my stated preferences (for example, I said I cared more about saving time than money, and they recommended a service done by students where the main draw is that it's cheap and supervised by experienced professionals).

And one used Yelp to look stuff up and made phone calls that weren't answered, and gave up instead of sending emails or trying again or trying a different search method.

So I spent some money, but didn't save much time or effort. Probably it's better for tasks like "Bring object X from point A to point B."