Fair enough Mick.
I'm going to take a guess that you're a bigger, heavier set guy (maybe not over 5"10?)? I was showing a mate, who's just getting back into gym, conventional deads on the weekend and it was a real struggle. We are both about 6"1, but his legs and arms are just so damn long and it looked awkward for the first few sets. He managed to dead 80kg, but it wasn't pretty. Whereas, with the SLDL he can probably do a similar weight (perhaps lower, say 60kg) but really work the intended muscles (without fear of ruining his back). We took a video, I'm tempted to chuck it up (if he agrees) and see what you guys think - as it will be helpful for me too.
As for incline bench, that comment is based on the issues that seem to pop up in the shoulder from regular flat barbell bench and to avoid over-development of the bottom 1/2-2/3 of the chest.