This fund's return has been good, but I'm not sure that recent history is a good guide to the future. Two thirds of the portfolio is bonds and bonds had a very good year last year. That's unlikely to be repeated. Eventually, the Fed will end the low interest rate policy and then the bonds are likely to drag. On the other hand, the reason the Fed might end the policy is because the economy is doing well and that should help the stock portfolio.
"Slow and steady" is just about right. You can expect some years a bit more and some years a bit less. You won't ever get super returns in a short time. But you will get good returns over market cycles.