I've had an FL1200 (~48") for about a year now. The only thing I don't like about it is the way the offset is done. There are two fixed points where you can bolt the top-link mast, and the lower link clevises can be adjusted anywhere along a front bar.
The problem is, in either position, the top-link mast does not allow the gear box to line up directly behind the PTO. The end result is that in either position, the PTO shaft is angled, even when perfectly level. On my BX, this extra angling causes problems when raising the tiller, because the combined offset is too much for the shaft to turn without binding up. The problem is particularly severe with a BX because the PTO shaft has to be cut rather short to fit my tractor. I have to make sure that I have the PTO disengaged before raising the tiller too far (about 2/3rds full height). Now that I'm used to it, it isn't that big of a deal, but I still would rather it not be an issue.
Other than that, I've been pleased with the tiller. I don't have a lot of area to till, but every square inch of it is rock-infested. So far, the abuse does not seem to be a problem. I got it from Agri-Supply for I believe $970, including tax and shipping.
Kevin