Recently bought this as an addition to my G5S - very pleased. Fantastic for leg/calf presses. Same commercial grade construction. Easily assembled (compared to the G5S). The 2X leverage means the 210lb weight stack feels like 420lb ... more than enough weight!
Note: You can attach this leg press on either the left or right hand side! (Also, the G5S can only support one add-on as there is only one tie-in to the existing weight stack.)