Generally very pleased with Rent-a-Son. The movers -- I had 3 "sons" -- were on-time (even a few minutes early) and very professional throughout the move...no complaining, no wasted time, very gracious, etc... I was quoted 4.5 hours from start-to-finish which was almost spot-on. Only complaint I'd have is that they did not bring 2 spare boxes I asked for to pack some extra odds and ends, although that fault lies with the head office and not the actual movers. Also, they nickel-and-dime you a bit by charging $25 per art box and each one can only hold two paintings.
Overall I'd recommend though you can probably save a few bucks elsewhere.