Highly recommend. We had Mark for a tour guide. Our morning was a little rough, as it sometimes goes with children. He was very patient despite us arriving 15 minutes later. He saved us a FREE parking spot since we aren't staying directly in DC.
We saw everything listed and I honestly don't know how we could have done it all without this tour. He dropped us off right in front of everything, with short walks to the perfect photo op spots.
We had stops at the White House, Tidal Basin, Jefferson Memorial, MLK Memorial w/ more beautiful pictures of the cherry blossoms, the Korean War memorial, the Capitol, the Marine Corp memorial, Lincoln Memorial/National Mall, and Arlington Cemetery where we walked to see JFK's gravesite and Robert E. Lee's home (in the background).
Mark was very knowledgeable and even gave us helpful hints for other plans we have during our stay.
I will be recommending this tour to anyone who comes to DC. It is totally worth the money.