Frogbox was terrific! The boxes themselves are really sturdy and the lids close nicely. The boxes stack so well - we fit all of our personal belongings in a cube van which means you spend less money on cars to move. The pick up and drop off were very smooth, and Frogbox allows you add moving supplies and change pick up and drop off times throughout the process.
My only suggestion is to ensure you wear gloves. The handles on the boxes are handy to lift, but hands get sore after lifting all day.