The quality of all the parts is excellent - the extruded aluminum rails are very strong! The instructions are a bit hazy so I used YouTube video to set it up in about 10 minutes (minus drilling a router plate). I was stunned at how easily the wheels allowed the sled to move! I would like to get a second pair of the clamps that hold the base to the rail as the torque of the router (2.5hp on lowest rpm) twists the base. I did not buy the dust collector, but I attached brush material to the rails and that seems to work pretty good when taking small 'bites' of material. I personally think this is the BEST VALUE on the market for slab flattening!