Despite my efforts to have redundant equipment at the ready in case of a break down (or large jump in staff), I had our 2 compactors break down within a day of eachother. This resulted in a hasty purchase of a 3rd compactor, along with ordering 2 Honda power plants for the 2 broken ones. The one I just bought is the Wacker 1550. After using it for a day, I liked the speed, but was very impressed with compaction. With that, I thought I'd comment on the compactors we have, and their strengths and weaknesses. I'd love to hear others with experience with several brands to volunteer their observations, too. Our first compactor - a Stone S-28 - 5hp Briggs. Very heavy, and slow travel, but with that speed it's easy to steer. Rated compressive force is around 3,300#, pretty much the same as the rest. Compaction is good. Second - Bomag - don't recall the model, but has a 5.5 Honda. Very fast, about 130 pounds. Approximately same rated compaction, and performs as such. One person can lift (with a little effort). Due to speed, a little hard to drive in tight spaces. Third - Wacker 1550 - 5.5 Honda. Same rated compaction. Not as fast as the Bomag, but almost. And compaction! There was noticeable increase in difficulty of driving edge restraint spikes into the compacted stone, more difficult to pull pipe, much more difficult to rake out high spots. A little heavier than the Bomag, not as heavy as the Stone. I really didn't think compaction could vary that much given the same size engine, but it can. How 'bout the rest of you hardscapers - any experience with different brands of reversible compactors? That's next on my list.