This is a beautiful trail in a wonderful regional park. Easy parking, running water bathrooms, and good signage. Reading the reviews from those who bring families and dogs, I would agree that it's nice for everyone.
Now I'll write from the point-of-view of the solo hiker. It's not the best trail for your workout if you go during peak times. The problem is that it is mostly single-track, so you are going to need to pull over, or have others pull over for passing. Especially if you're running down....that was a total pain, trying to avoid dogs and families. Don't get me wrong - everyone was great, and accommodating (mostly) but it definitely makes for a much more challenging workout process.
If you're in workout mode, you'll make it up in about 40ish minutes, and down in 20ish.