I've been using Warren's Homework for over 10 years now and have never had a problem. They show up on time, work quickly, and are careful with your belongings.
On my most recent move, I had to cancel the first time as they were showing up because my spouse had to go to the ER. They were kind and didn't charge me anything for cancelling.
To the person who complained about the cost about moving 3 blocks, distance is irrelevant to the cost. You still have to load and unload everything whether you move 3 blocks or 3 miles. The only difference would have been the travel time between the 2 houses.