I have been using this for about a month now and am very pleased with it. Yes, it is heavier than the B+D Workmate but not that much. Anyway the B+D is a bit flimsy made nowadays. I find this an asset as it makes it much more sturdy. The adjustable height has come in handy cutting 4m floorboards, I can change the height and tilt the top so the floor boards fit in a stepladder for support and lay flat on the workbench (I have been using it on a slope)The work surface is MDF, so I wouldn't work in the rain outside. Why they didn't make it out of ply defeats me but that is the only criticism. The work surface measures 65cm wide and 52cm depth. The middle section can be removed but when left in makes a nice size worktop. As another reviewer pointed out, I would definitely put a drop of locktite on the bolts as there are no spring/lock washers.
Update: I have been using this for a year now and I am really pleased with it. Its looking a bit shabby now after a lot of abuse/use but nothing has gone wrong with it or fell off. The MDF top worked fine for me, I just made sure it didn't get wet. The tilting top comes in very handy as I have been using it in our garden which is on a slope (also came in handy for getting the last drop of home brew out of my fermenting bucket) Definitely recommend this.