I own a 630; I also have a 610 (belt drive) and there is night and day difference with the 630 which is a hydrostatic drive. I generally like it because it has many of the features of the "new generation" skid steers, including standard Bob-Tach and auxillary hydraulics but is fairly simple to work on with no computer and a simple 30 HP Wisconsin motor. You shouldn't expect it to move mountains but if you are looking at a 600 series skid steer then you know you aren't getting the most powerful one out there. I wouldn't get it if you plan to use the auxillaries for applications requiring high flows and since it is air-cooled, it can overheat if you really work it in warmer weather. if you plan to really work it hard, you may want to step up to the water cooled engines (I think that is the 632?). if you need more hydraulic flow through the auxillaries, you may want to consider the 700 and up series models.