I have two, an 'Ultimate' and a GP (got a good deal
) since I have a light carbon for shorts hikes and a Manfrotto 055XProB for longer lenses and more stability. I tried many different combos but would not trade either a present. They handle all the weight I can put on them securely - portrait/landscape, tighten easily and securely and have big enough knobs that I have no trouble adjusting by feel, even in the dark. Highly recommend either model. Because of the full range of locking positions, i've never felt the need for an "L" bracket.
If you are in the area of their plant, try them out. I think you'll be sold.