Ordered a used 2006 Trek Fuel Ex 8 (100 mm) for my lady and it got damaged in shipping. The shipper will give me some cash for a new shock and cant decide between these (found both in the right dimensions), as they are about the same price. The Monarch 4.2 has better adjustments, and sounds like its easier to work on but seems to have a lot of issues. The Fox Float (2008/9) seems to be less problematic but also has no lockout/propedal switch. Also it sounds like they are harder to work on. Also might look into a take off of an RL or RP. The girlfriend just wants to leave it up to me although she commented that if I got lockout she would probably just leave it open as she does not plan on messing with anything while she is riding. I guess remembering to shift is hard enough.