I can't think of enough nice things to say about these guys. I moved from one studio apartment to another (from Berkeley to San Francisco) in April and they sent two movers to make it happen (Adam and another guy- can't remember his name). This move was the second time that I hired We Are Moving Relocation systems.
They are very upfront about the costs (which I think are competitive, but to be honest I didn't shop around much). The movers were courteous, respectful of my belongings and they worked efficiently and quickly so as to minimize the cost of the move. They also brought lots of extras to help. They brought boxes with rods in them for my hanging clothes (no extra cost) as well as plastic wrap for furniture with drawers (so that I wouldn't have to empty the drawers), and some large plastic containers for odds and ends (no extra cost).
Both of my moves were during heat waves and I was truly amazed at how fast these guys move (and how strong they are, my G-d!).
If you're moving within the Bay Area definitely look into We Are Moving Relocations. If I move again I would hire them for a third time.
They offer 5% discount for cash payment :)