My wife and I booked this tour for a Friday morning ride. Easy to get to the starting point and there are plenty of bikes and bike helmets to choose from.
Our guide was Wally and he was really nice, spending a bit of time before our ride giving us some information about our route and answering any questions we had.
Our path took us around the Tidal Basin and along the way we visited the MLK Memorial, the FDR Memorial and the Jefferson Memorial. While cherry blossom trees were listed as part of the itinerary, the timing was off as most of the trees had already blossomed and several days of wind had removed many of the blossoms. But we did come across a few trees in full bloom and were allowed with plenty of time for photos under the trees as well as at any of the memorials. After biking around the Tidal Basin, we headed over the National Mall and stopped at the Washington Monument for more photo opportunities.
The ride was very easy and at no time did our group get strung out and separated, so getting through traffic lights and such wasn't a problem. Fortunately the pedestrian traffic was pretty light that day as well, so that made riding around certain areas much easier.
My wife both really enjoyed the tour and would do it again, but we definitely would want to make sure the crowds aren't really heavy.